diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b52052fc4..5fef4f37c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,8 +21,8 @@ jobs:
     name: Build
     strategy:
       matrix:
-        go-version: [1.23.x, 1.22.x]
-        platform: [ubuntu-20.04, macos-latest, windows-latest]
+        go-version: [1.24.x, 1.23.x]
+        platform: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
     steps:
     - name: Install Go
@@ -50,20 +50,19 @@ jobs:
         fetch-depth: 1
 
     - name: Install Linux packages
-      if: matrix.platform == 'ubuntu-20.04'
+      if: matrix.platform == 'ubuntu-latest'
       run: |
         sudo apt-get update
-        sudo apt-get install -qq gcc pkg-config libwayland-dev libx11-dev libx11-xcb-dev libxkbcommon-x11-dev libgles2-mesa-dev libegl1-mesa-dev libffi-dev libxcursor-dev libvulkan-dev xvfb xdotool
         go run ./ci/install-cxx-root.go -root-version=${ROOT_VERSION} -o=${HOME}
         source $HOME/root-${ROOT_VERSION}/bin/thisroot.sh
         root.exe --version
     
     - name: Build-Linux-32b
-      if: matrix.platform == 'ubuntu-20.04'
+      if: matrix.platform == 'ubuntu-latest'
       run: |
         GOARCH=386   go install -v $TAGS,cross_compile ./...
     - name: Build-Linux-64b
-      if: matrix.platform == 'ubuntu-20.04'
+      if: matrix.platform == 'ubuntu-latest'
       run: |
         GOARCH=amd64 go install -v $TAGS ./...       
     - name: Build-Windows
@@ -75,7 +74,7 @@ jobs:
       run: |
         go install -v $TAGS ./...
     - name: Test Linux
-      if: matrix.platform == 'ubuntu-20.04'
+      if: matrix.platform == 'ubuntu-latest'
       run: |
         go run ./ci/run-tests.go $TAGS -race $COVERAGE
         go vet $TAGS ./...
@@ -94,7 +93,7 @@ jobs:
       with:
         install-go: false
         cache-key: ${{ matrix.platform }}
-        version: "2024.1.1"
+        version: "2025.1"
     - name: Upload-Coverage
-      if: matrix.platform == 'ubuntu-20.04'
+      if: matrix.platform == 'ubuntu-latest'
       uses: codecov/codecov-action@v3
diff --git a/ci/mk-release.go b/ci/mk-release.go
index 93c78d6f5..88ea5441d 100644
--- a/ci/mk-release.go
+++ b/ci/mk-release.go
@@ -321,32 +321,12 @@ func setLatest(version string) {
 }
 
 var excludeList = map[OSArch]map[string]struct{}{
-	{"linux", "386"}: {
-		"go-hep.org/x/hep/hplot/cmd/iplot": struct{}{},
-	},
-	{"linux", "arm64"}: {
-		"go-hep.org/x/hep/hplot/cmd/iplot": struct{}{},
-	},
-	{"darwin", "amd64"}: {
-		"go-hep.org/x/hep/hplot/cmd/iplot": {},
-	},
-	{"freebsd", "amd64"}: {
-		"go-hep.org/x/hep/hplot/cmd/iplot":     struct{}{},
-		"go-hep.org/x/hep/groot/cmd/root-fuse": struct{}{},
-		"go-hep.org/x/hep/xrootd/cmd/xrd-fuse": struct{}{},
-	},
-	{"windows", "amd64"}: {
-		"go-hep.org/x/hep/groot/cmd/root-fuse": struct{}{},
-		"go-hep.org/x/hep/xrootd/cmd/xrd-fuse": struct{}{},
-	},
-	{"windows", "386"}: {
-		"go-hep.org/x/hep/groot/cmd/root-fuse": struct{}{},
-		"go-hep.org/x/hep/xrootd/cmd/xrd-fuse": struct{}{},
-	},
+	{"linux", "386"}:     {},
+	{"linux", "arm64"}:   {},
+	{"darwin", "amd64"}:  {},
+	{"freebsd", "amd64"}: {},
+	{"windows", "amd64"}: {},
+	{"windows", "386"}:   {},
 }
 
-var needCgo = map[string]struct{}{
-	"pawgo": {},
-	"iplot": {},
-	"hplot": {},
-}
+var needCgo = map[string]struct{}{}
diff --git a/go.mod b/go.mod
index 235346e9f..1b36e4671 100644
--- a/go.mod
+++ b/go.mod
@@ -1,22 +1,19 @@
 module go-hep.org/x/hep
 
-go 1.22.0
+go 1.23
 
 require (
-	gioui.org v0.3.0
 	git.sr.ht/~sbinet/epok v0.5.0
-	git.sr.ht/~sbinet/go-arrow v0.2.0
+	git.sr.ht/~sbinet/go-arrow v0.3.0
 	github.com/astrogo/fitsio v0.3.0
 	github.com/campoy/embedmd v1.0.0
 	github.com/go-mmap/mmap v0.7.0
 	github.com/gonuts/binary v0.2.0
 	github.com/gonuts/commander v0.4.1
 	github.com/google/go-cmp v0.6.0
-	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
 	github.com/hashicorp/go-uuid v1.0.3
 	github.com/jcmturner/gokrb5/v8 v8.4.4
 	github.com/klauspost/compress v1.17.11
-	github.com/peterh/liner v1.2.2
 	github.com/pierrec/lz4/v4 v4.1.22
 	github.com/pierrec/xxHash v0.1.5
 	github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e
@@ -36,32 +33,24 @@ require (
 )
 
 require (
-	gioui.org/cpu v0.0.0-20220412190645-f1e9e8c3b1f7 // indirect
-	gioui.org/shader v1.0.6 // indirect
-	gioui.org/x v0.3.0 // indirect
 	git.sr.ht/~sbinet/gg v0.6.0 // indirect
 	github.com/ajstarks/svgo v0.0.0-20211024235047-1546f124cd8b // indirect
-	github.com/andybalholm/stroke v0.0.0-20230904101225-24ef450bc62c // indirect
 	github.com/edsrzf/mmap-go v1.2.0 // indirect
 	github.com/go-fonts/liberation v0.3.3 // indirect
 	github.com/go-latex/latex v0.0.0-20240709081214-31cef3c7570e // indirect
 	github.com/go-pdf/fpdf v0.9.0 // indirect
-	github.com/go-text/typesetting v0.0.0-20230905121921-abdbcca6e0eb // indirect
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
-	github.com/google/flatbuffers v23.5.26+incompatible // indirect
+	github.com/google/flatbuffers v25.2.10+incompatible // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/hashicorp/go-multierror v1.1.1 // indirect
 	github.com/jcmturner/aescts/v2 v2.0.0 // indirect
 	github.com/jcmturner/dnsutils/v2 v2.0.0 // indirect
 	github.com/jcmturner/gofork v1.7.6 // indirect
 	github.com/jcmturner/rpc/v2 v2.0.3 // indirect
-	github.com/mattn/go-runewidth v0.0.16 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/posener/complete v1.2.3 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
-	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/teambition/rrule-go v1.8.2 // indirect
-	golang.org/x/exp/shiny v0.0.0-20241009180824-f66d83c29e7c // indirect
 	golang.org/x/mod v0.22.0 // indirect
 	golang.org/x/net v0.33.0 // indirect
 	golang.org/x/sys v0.28.0 // indirect
@@ -72,9 +61,9 @@ require (
 	modernc.org/golex v1.1.0 // indirect
 	modernc.org/internal v1.1.0 // indirect
 	modernc.org/lldb v1.0.8 // indirect
-	modernc.org/mathutil v1.6.0 // indirect
-	modernc.org/sortutil v1.2.0 // indirect
-	modernc.org/strutil v1.2.0 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/sortutil v1.2.1 // indirect
+	modernc.org/strutil v1.2.1 // indirect
 	modernc.org/zappy v1.1.0 // indirect
 	rsc.io/pdf v0.1.1 // indirect
 )
diff --git a/go.sum b/go.sum
index f32874218..d374b6a9e 100644
--- a/go.sum
+++ b/go.sum
@@ -1,29 +1,16 @@
-eliasnaur.com/font v0.0.0-20230308162249-dd43949cb42d h1:ARo7NCVvN2NdhLlJE9xAbKweuI9L6UgfTbYb0YwPacY=
-eliasnaur.com/font v0.0.0-20230308162249-dd43949cb42d/go.mod h1:OYVuxibdk9OSLX8vAqydtRPP87PyTFcT9uH3MlEGBQA=
-gioui.org v0.3.0 h1:xZty/uLl1+/HNKpumX60JPQd46n8Zy6lc5T3IRMKoR4=
-gioui.org v0.3.0/go.mod h1:1H72sKEk/fNFV+l0JNeM2Dt3co3Y4uaQcD+I+/GQ0e4=
-gioui.org/cpu v0.0.0-20210808092351-bfe733dd3334/go.mod h1:A8M0Cn5o+vY5LTMlnRoK3O5kG+rH0kWfJjeKd9QpBmQ=
-gioui.org/cpu v0.0.0-20220412190645-f1e9e8c3b1f7 h1:tNJdnP5CgM39PRc+KWmBRRYX/zJ+rd5XaYxY5d5veqA=
-gioui.org/cpu v0.0.0-20220412190645-f1e9e8c3b1f7/go.mod h1:A8M0Cn5o+vY5LTMlnRoK3O5kG+rH0kWfJjeKd9QpBmQ=
-gioui.org/shader v1.0.6 h1:cvZmU+eODFR2545X+/8XucgZdTtEjR3QWW6W65b0q5Y=
-gioui.org/shader v1.0.6/go.mod h1:mWdiME581d/kV7/iEhLmUgUK5iZ09XR5XpduXzbePVM=
-gioui.org/x v0.3.0 h1:XupHLCT2D1G8qvXxN/EoX+IMpDiG5CHokg6j33rSH9I=
-gioui.org/x v0.3.0/go.mod h1:Y/VG4cEJuj938VSzbN21oDg/ZgpKa/P9ipwtTSL1vbU=
 git.sr.ht/~sbinet/cmpimg v0.1.0 h1:E0zPRk2muWuCqSKSVZIWsgtU9pjsw3eKHi8VmQeScxo=
 git.sr.ht/~sbinet/cmpimg v0.1.0/go.mod h1:FU12psLbF4TfNXkKH2ZZQ29crIqoiqTZmeQ7dkp/pxE=
 git.sr.ht/~sbinet/epok v0.5.0 h1:eQcocQpGQVYWLiA93dkIgngH0jjjDiTdj7rS3vQLp6w=
 git.sr.ht/~sbinet/epok v0.5.0/go.mod h1:IO3V831F7MiJ78BrBPcZLImTJSkPYAQeFYXJkdlnU2I=
 git.sr.ht/~sbinet/gg v0.6.0 h1:RIzgkizAk+9r7uPzf/VfbJHBMKUr0F5hRFxTUGMnt38=
 git.sr.ht/~sbinet/gg v0.6.0/go.mod h1:uucygbfC9wVPQIfrmwM2et0imr8L7KQWywX0xpFMm94=
-git.sr.ht/~sbinet/go-arrow v0.2.0 h1:QIiVPcEtMb2lzOWDgBrIz9Sa+7Xvs2EJ/Icxe6IcUSI=
-git.sr.ht/~sbinet/go-arrow v0.2.0/go.mod h1:GIva9P8b7Pom+/pOUMPX5YOrtLOUdGb5tLXBfKuelTY=
+git.sr.ht/~sbinet/go-arrow v0.3.0 h1:yH0+AVr3iZtSNcFMpKpNXrZfeoPZPA80fn4FdjOiHAw=
+git.sr.ht/~sbinet/go-arrow v0.3.0/go.mod h1:w/rRkiCdHWMNU0EDGrGpTjEwhSQLruknITV8C9pvMAQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/ajstarks/deck v0.0.0-20200831202436-30c9fc6549a9/go.mod h1:JynElWSGnm/4RlzPXRlREEwqTHAN3T56Bv2ITsFT3gY=
 github.com/ajstarks/deck/generate v0.0.0-20210309230005-c3f852c02e19/go.mod h1:T13YZdzov6OU0A1+RfKZiZN9ca6VeKdBdyDV+BY97Tk=
 github.com/ajstarks/svgo v0.0.0-20211024235047-1546f124cd8b h1:slYM766cy2nI3BwyRiyQj/Ud48djTMtMebDqepE95rw=
 github.com/ajstarks/svgo v0.0.0-20211024235047-1546f124cd8b/go.mod h1:1KcenG0jGWcpt8ov532z81sp/kMMUG485J2InIOyADM=
-github.com/andybalholm/stroke v0.0.0-20230904101225-24ef450bc62c h1:hHefapU8Zg8roqjYi9V8CNFPD0z6tbDDSqNgBgY1O4U=
-github.com/andybalholm/stroke v0.0.0-20230904101225-24ef450bc62c/go.mod h1:ccdDYaY5+gO+cbnQdFxEXqfy0RkoV25H3jLXUDNM3wg=
 github.com/astrogo/fitsio v0.3.0 h1:iQ/lGCREuct04H1dTzPLndbzGo/4SNgpO0JuAhM+YtE=
 github.com/astrogo/fitsio v0.3.0/go.mod h1:QRvq9GRh56Pa+TkX3iBHo6Upwd7KKIKgL2KO291Gdu0=
 github.com/campoy/embedmd v1.0.0 h1:V4kI2qTJJLf4J29RzI/MAt2c3Bl4dQSYPuflzwFH2hY=
@@ -46,10 +33,6 @@ github.com/go-mmap/mmap v0.7.0 h1:+h1n06sZw0IWBwL9YDzTomNNXxM4LH/l+HVpGaTC+qk=
 github.com/go-mmap/mmap v0.7.0/go.mod h1:moN8m00bW6Mpk+Y1xQFeL3xZqycnT4qUAf852ICV/Gc=
 github.com/go-pdf/fpdf v0.9.0 h1:PPvSaUuo1iMi9KkaAn90NuKi+P4gwMedWPHhj8YlJQw=
 github.com/go-pdf/fpdf v0.9.0/go.mod h1:oO8N111TkmKb9D7VvWGLvLJlaZUQVPM+6V42pp3iV4Y=
-github.com/go-text/typesetting v0.0.0-20230905121921-abdbcca6e0eb h1:4GpJirtA8yY24aqbU3uppiXGYiVpWfLIrqc2NNKKk9s=
-github.com/go-text/typesetting v0.0.0-20230905121921-abdbcca6e0eb/go.mod h1:evDBbvNR/KaVFZ2ZlDSOWWXIUKq0wCOEtzLxRM8SG3k=
-github.com/go-text/typesetting-utils v0.0.0-20230616150549-2a7df14b6a22 h1:LBQTFxP2MfsyEDqSKmUBZaDuDHN1vpqDyOZjcqS7MYI=
-github.com/go-text/typesetting-utils v0.0.0-20230616150549-2a7df14b6a22/go.mod h1:DDxDdQEnB70R8owOx3LVpEFvpMK9eeH1o2r0yZhFI9o=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
 github.com/golang/snappy v0.0.3 h1:fHPg5GQYlCeLIPB9BZqMVR5nR9A+IM5zcgeTdjMYmLA=
@@ -58,12 +41,10 @@ github.com/gonuts/binary v0.2.0 h1:caITwMWAoQWlL0RNvv2lTU/AHqAJlVuu6nZmNgfbKW4=
 github.com/gonuts/binary v0.2.0/go.mod h1:kM+CtBrCGDSKdv8WXTuCUsw+loiy8f/QEI8YCCC0M/E=
 github.com/gonuts/commander v0.4.1 h1:7lmZMnCuDHA0365niE4V5N0Om/hsl6fXskt4MWaKPvg=
 github.com/gonuts/commander v0.4.1/go.mod h1:qkKJBkuvjm1FgHrH7PO3pMIOuGpl/CDfy+6qw3VKNQs=
-github.com/google/flatbuffers v23.5.26+incompatible h1:M9dgRyhJemaM4Sw8+66GHBu8ioaQmyPLg1b8VwK5WJg=
-github.com/google/flatbuffers v23.5.26+incompatible/go.mod h1:1AeVuKshWv4vARoZatz6mlQ0JxURH0Kv5+zNeJKJCa8=
+github.com/google/flatbuffers v25.2.10+incompatible h1:F3vclr7C3HpB1k9mxCGRMXq6FdUalZ6H/pNX4FP1v0Q=
+github.com/google/flatbuffers v25.2.10+incompatible/go.mod h1:1AeVuKshWv4vARoZatz6mlQ0JxURH0Kv5+zNeJKJCa8=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4=
-github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
 github.com/gorilla/securecookie v1.1.1/go.mod h1:ra0sb63/xPlUeL+yeDciTfxMRAA+MP+HVt/4epWDjd4=
 github.com/gorilla/sessions v1.2.1/go.mod h1:dk2InVEVJ0sfLlnXv9EAgkf6ecYs/i80K/zI+bUmuGM=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
@@ -90,11 +71,6 @@ github.com/jcmturner/rpc/v2 v2.0.3/go.mod h1:VUJYCIDm3PVOEHw8sgt091/20OJjskO/YJk
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/compress v1.17.11 h1:In6xLpyWOi1+C7tXUUWv2ot1QvBjxevKAaI6IXrJmUc=
 github.com/klauspost/compress v1.17.11/go.mod h1:pMDklpSncoRMuLFrf1W9Ss9KT+0rH90U12bZKk7uwG0=
-github.com/mattn/go-runewidth v0.0.3/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
-github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
-github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
-github.com/peterh/liner v1.2.2 h1:aJ4AOodmL+JxOZZEL2u9iJf8omNRpqHc/EbrK+3mAXw=
-github.com/peterh/liner v1.2.2/go.mod h1:xFwJyiKIXJZUKItq5dGHZSTBRAuG/CpeNpWLyiNRNwI=
 github.com/pierrec/lz4/v4 v4.1.22 h1:cKFw6uJDK+/gfw5BcDL0JL5aBsAFdsIT18eRtLj7VIU=
 github.com/pierrec/lz4/v4 v4.1.22/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
 github.com/pierrec/xxHash v0.1.5 h1:n/jBpwTHiER4xYvK3/CdPVnLDPchj8eTJFFLUb4QHBo=
@@ -108,9 +84,6 @@ github.com/posener/complete v1.2.3/go.mod h1:WZIdtGGp+qx0sLrYKtIRAruyNpv6hFCicSg
 github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
-github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
-github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
-github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/sbinet/npyio v0.8.0 h1:n+jtLFIjcJNENOI44lG7BUwWFqtgdQAerqyXDtC956A=
 github.com/sbinet/npyio v0.8.0/go.mod h1:26fj1nEFY78AYqkANkcSw4dYwLHXFWFehgOSu5HKwgw=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
@@ -120,8 +93,9 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
+github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/teambition/rrule-go v1.8.2 h1:lIjpjvWTj9fFUZCmuoVDrKVOtdiyzbzc93qTmRVe/J8=
 github.com/teambition/rrule-go v1.8.2/go.mod h1:Ieq5AbrKGciP1V//Wq8ktsTXwSwJHDD5mD/wLBGl3p4=
 github.com/ulikunitz/xz v0.5.12 h1:37Nm15o69RwBkXM0J6A5OlE67RZTfzUxTj8fB3dfcsc=
@@ -139,8 +113,6 @@ golang.org/x/crypto v0.31.0 h1:ihbySMvVjLAeSH1IbfcRTkD/iNscyz8rGzjF/E5hV6U=
 golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
 golang.org/x/exp v0.0.0-20241217172543-b2144cdd0a67 h1:1UoZQm6f0P/ZO0w1Ri+f+ifG/gXhegadRdwBIXEFWDo=
 golang.org/x/exp v0.0.0-20241217172543-b2144cdd0a67/go.mod h1:qj5a5QZpwLU2NLQudwIN5koi3beDhSAlJwa67PuM98c=
-golang.org/x/exp/shiny v0.0.0-20241009180824-f66d83c29e7c h1:jTMrjjZRcSH/BDxWhXCP6OWsfVgmnwI7J+F4/nyVXaU=
-golang.org/x/exp/shiny v0.0.0-20241009180824-f66d83c29e7c/go.mod h1:3F+MieQB7dRYLTmnncoFbb1crS5lfQoTfDgQy6K4N0o=
 golang.org/x/image v0.23.0 h1:HseQ7c2OpPKTPVzNjG5fwJsOTCiiwS4QdsYi5XU6H68=
 golang.org/x/image v0.23.0/go.mod h1:wJJBTdLfCCf3tiHa1fNxpZmUI4mmoZvwMCPP0ddoNKY=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
@@ -168,7 +140,6 @@ golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20211117180635-dee7805ff2e1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -222,15 +193,15 @@ modernc.org/internal v1.1.0/go.mod h1:IFhfxUE81NbN8Riy+oHylA3PIYgAvIQ5eMufNzg7/Q
 modernc.org/lldb v1.0.8 h1:gM0Lpmgtw0h/ylWQSxABvzJ++TZKhf1Q/uPAGBAM6aU=
 modernc.org/lldb v1.0.8/go.mod h1:ybOcsZ/RNZo3q8fiGadQFRnD+1Jc+RWGcTPdeilCnUk=
 modernc.org/mathutil v1.5.0/go.mod h1:mZW8CKdRPY1v87qxC/wUdX5O1qDzXMP5TH3wjfpga6E=
-modernc.org/mathutil v1.6.0 h1:fRe9+AmYlaej+64JsEEhoWuAYBkOtQiMEU7n/XgfYi4=
-modernc.org/mathutil v1.6.0/go.mod h1:Ui5Q9q1TR2gFm0AQRqQUaBWFLAhQpCwNcuhBOSedWPo=
+modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
+modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
 modernc.org/ql v1.4.7 h1:dnGGGL5tHmPwVhMAylnLlwrnIrtk8PPb5KRfMvfgJzE=
 modernc.org/ql v1.4.7/go.mod h1:I900l6z8ckpPy1y9VR0gu4pZ9hl9AhmQla4F8KERzdc=
 modernc.org/sortutil v1.1.1/go.mod h1:DTj/8BqjEBLZFVPYvEGDfFFg94SsfPxQ70R+SQJ98qA=
-modernc.org/sortutil v1.2.0 h1:jQiD3PfS2REGJNzNCMMaLSp/wdMNieTbKX920Cqdgqc=
-modernc.org/sortutil v1.2.0/go.mod h1:TKU2s7kJMf1AE84OoiGppNHJwvB753OYfNl2WRb++Ss=
-modernc.org/strutil v1.2.0 h1:agBi9dp1I+eOnxXeiZawM8F4LawKv4NzGWSaLfyeNZA=
-modernc.org/strutil v1.2.0/go.mod h1:/mdcBmfOibveCTBxUl5B5l6W+TTH1FXPLHZE6bTosX0=
+modernc.org/sortutil v1.2.1 h1:+xyoGf15mM3NMlPDnFqrteY07klSFxLElE2PVuWIJ7w=
+modernc.org/sortutil v1.2.1/go.mod h1:7ZI3a3REbai7gzCLcotuw9AC4VZVpYMjDzETGsSMqJE=
+modernc.org/strutil v1.2.1 h1:UneZBkQA+DX2Rp35KcM69cSsNES9ly8mQWD71HKlOA0=
+modernc.org/strutil v1.2.1/go.mod h1:EHkiggD70koQxjVdSBM3JKM7k6L0FbGE5eymy9i3B9A=
 modernc.org/zappy v1.0.9/go.mod h1:y2c4Hv5jzyBP179SxNmx5H/BM6cVgNIXPQv2bCeR6IM=
 modernc.org/zappy v1.1.0 h1:cAf9HrymATNo2hYMc9c37y0tiZJYuKM2xa1ZAP8THUw=
 modernc.org/zappy v1.1.0/go.mod h1:cxC0dWAgZuyMsJ+KL3ZBgo3twyKGBB/0By/umSZE2bQ=
diff --git a/hplot/cmd/iplot/main.go b/hplot/cmd/iplot/main.go
deleted file mode 100644
index 396aec44b..000000000
--- a/hplot/cmd/iplot/main.go
+++ /dev/null
@@ -1,129 +0,0 @@
-// Copyright ©2017 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build !cross_compile
-
-package main
-
-import (
-	"image/color"
-	"math/rand"
-	"os"
-	"strings"
-
-	"gioui.org/app"
-	"gioui.org/io/key"
-	"gioui.org/io/system"
-	"gioui.org/layout"
-	"gioui.org/op"
-	"gioui.org/op/clip"
-	"gioui.org/unit"
-	"go-hep.org/x/hep/hbook"
-	"go-hep.org/x/hep/hplot"
-	"gonum.org/v1/plot/plotter"
-	"gonum.org/v1/plot/vg/draw"
-	"gonum.org/v1/plot/vg/vggio"
-)
-
-const (
-	NPOINTS = 100000
-	dpi     = 96
-)
-
-func main() {
-	go run()
-	app.Main()
-}
-
-func run() {
-	w, h := hplot.Dims(-1, -1)
-	win := app.NewWindow(
-		app.Title("iplot"),
-		app.Size(
-			unit.Dp(float32(w.Dots(dpi))),
-			unit.Dp(float32(h.Dots(dpi))),
-		),
-	)
-	defer os.Exit(0)
-
-	keys := key.Set(strings.Join(
-		[]string{key.NameEscape, "Q", " ", key.NameReturn, key.NameEnter},
-		"|",
-	))
-
-	for e := range win.Events() {
-		switch e := e.(type) {
-		case system.FrameEvent:
-			var (
-				ops op.Ops
-				gtx = layout.NewContext(&ops, e)
-			)
-			// register a global key listener for the escape key wrapping our entire UI.
-			area := clip.Rect{Max: gtx.Constraints.Max}.Push(gtx.Ops)
-			key.InputOp{
-				Tag:  win,
-				Keys: keys,
-			}.Add(gtx.Ops)
-
-			for _, e := range gtx.Events(win) {
-				switch e := e.(type) {
-				case key.Event:
-					switch e.Name {
-					case "Q", key.NameEscape:
-						return
-					case " ", key.NameReturn, key.NameEnter:
-						if e.State == key.Press {
-							win.Invalidate()
-						}
-					}
-				}
-			}
-			area.Pop()
-
-			c := vggio.New(gtx, w, h)
-			p := newPlot()
-			p.Draw(draw.New(c))
-			e.Frame(c.Paint())
-
-		case system.DestroyEvent:
-			return
-		}
-	}
-}
-
-func newPlot() *hplot.Plot {
-	// Draw some random values from the standard
-	// normal distribution.
-	hist1 := hbook.NewH1D(100, -5, +5)
-	hist2 := hbook.NewH1D(100, -5, +5)
-	for i := 0; i < NPOINTS; i++ {
-		v1 := rand.NormFloat64() - 1
-		v2 := rand.NormFloat64() + 1
-		hist1.Fill(v1, 1)
-		hist2.Fill(v2, 1)
-	}
-
-	// Make a plot and set its title.
-	p := hplot.New()
-	p.Title.Text = "Histogram"
-	p.X.Label.Text = "X"
-	p.Y.Label.Text = "Y"
-
-	// Create a histogram of our values drawn
-	// from the standard normal.
-	h1 := hplot.NewH1D(hist1)
-	h1.Infos.Style = hplot.HInfoSummary
-	h1.Color = color.Black
-	h1.FillColor = nil
-
-	h2 := hplot.NewH1D(hist2)
-	h2.Infos.Style = hplot.HInfoNone
-	h2.Color = color.RGBA{255, 0, 0, 255}
-	h2.FillColor = nil
-
-	p.Add(h1, h2)
-
-	p.Add(plotter.NewGrid())
-	return p
-}
diff --git a/pawgo/README.md b/pawgo/README.md
deleted file mode 100644
index 256f5877c..000000000
--- a/pawgo/README.md
+++ /dev/null
@@ -1,47 +0,0 @@
-pawgo
-=====
-
-`pawgo` is a nod to the old `PAW` physics analysis workstation.
-
-## Installation
-
-```sh
-$ go get -u go-hep.org/x/hep/pawgo
-```
-
-## Example
-
-```
-$ pawgo
-
-:::::::::::::::::::::::::::::
-:::   Welcome to PAW-Go   :::
-:::::::::::::::::::::::::::::
-
-Type /? for help.
-^D or /quit to quit.
-
-paw> /?
-/!              -- run a shell command
-/?              -- print help
-/file/close     -- close a file
-/file/create    -- create file for write access
-/file/list      -- list a file's content
-/file/open      -- open file for read access
-/hist/open      -- open a histogram
-/hist/plot      -- plot a histogram
-/quit           -- quit PAW-Go
-
-paw> /file/open f testdata/hsimple.rio
-paw> /file/ls f
-/file/id/f name=testdata/hsimple.rio
- 	- h1	(type="*go-hep.org/x/hep/hbook.H1D")
- 	- h2	(type="*go-hep.org/x/hep/hbook.H1D")
-
-paw> /hist/open h /file/id/f/h1
-paw> /hist/plot h
-== h1d: name="h1"
-entries=1000
-mean=  -0.059
-RMS=   +1.009
-```
diff --git a/pawgo/app.go b/pawgo/app.go
deleted file mode 100644
index 21178d1b2..000000000
--- a/pawgo/app.go
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright ©2020 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build !cross_compile
-
-package main
-
-import (
-	"gioui.org/app"
-)
-
-func appMain() {
-	app.Main()
-}
diff --git a/pawgo/app_xcomp.go b/pawgo/app_xcomp.go
deleted file mode 100644
index 0e7e9a341..000000000
--- a/pawgo/app_xcomp.go
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright ©2020 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build cross_compile
-
-package main
-
-func appMain() {
-	select {}
-}
diff --git a/pawgo/cmd.go b/pawgo/cmd.go
deleted file mode 100644
index a6f9b9224..000000000
--- a/pawgo/cmd.go
+++ /dev/null
@@ -1,185 +0,0 @@
-// Copyright ©2015 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
-	"bufio"
-	"fmt"
-	"io"
-	"log"
-	"os"
-	"strings"
-
-	"github.com/google/shlex"
-	"github.com/peterh/liner"
-)
-
-type Cmdr interface {
-	Name() string
-	Run(args []string) error
-	Help(w io.Writer)
-	Complete(line string) []string
-}
-
-type Cmd struct {
-	msg  *log.Logger
-	rl   *liner.State
-	cmds map[string]Cmdr
-	wmgr *winMgr
-	fmgr *fileMgr
-	hmgr *histMgr
-}
-
-func newCmd(stdout io.Writer) *Cmd {
-	msg := log.New(stdout, "paw: ", 0)
-	c := Cmd{
-		msg:  msg,
-		rl:   liner.NewLiner(),
-		wmgr: newWinMgr(msg),
-		fmgr: newFileMgr(msg),
-		hmgr: newHistMgr(msg),
-	}
-	c.cmds = map[string]Cmdr{
-		"/?": &cmdHelp{&c},
-		"/!": &cmdShell{&c},
-
-		"/file/open":   &cmdFileOpen{&c},
-		"/file/close":  &cmdFileClose{&c},
-		"/file/create": &cmdFileCreate{&c},
-		"/file/ls":     &cmdFileList{&c},
-
-		"/hist/open": &cmdHistOpen{&c},
-		"/hist/plot": &cmdHistPlot{&c},
-
-		"/quit": &cmdQuit{&c},
-	}
-
-	c.rl.SetTabCompletionStyle(liner.TabPrints)
-	c.rl.SetCompleter(func(line string) []string {
-		var o []string
-		for k := range c.cmds {
-			if strings.HasPrefix(k, line) {
-				o = append(o, k+" ")
-			}
-		}
-		if len(o) > 0 {
-			return o
-		}
-
-		for k, cmd := range c.cmds {
-			if strings.HasPrefix(line, k) {
-				o = append(o, cmd.Complete(line)...)
-			}
-		}
-		return o
-	})
-
-	f, err := os.Open(".pawgo.history")
-	if err == nil {
-		defer f.Close()
-		_, _ = c.rl.ReadHistory(f)
-	}
-
-	return &c
-}
-
-func (c *Cmd) Close() error {
-	var err error
-
-	err = c.fmgr.Close()
-	if err != nil {
-		return fmt.Errorf("could not close file manager: %w", err)
-	}
-
-	err = c.wmgr.Close()
-	if err != nil {
-		return fmt.Errorf("could not close window manager: %w", err)
-	}
-
-	f, err := os.Create(".pawgo.history")
-	if err == nil {
-		defer f.Close()
-		_, _ = c.rl.WriteHistory(f)
-	}
-
-	e := c.rl.Close()
-	if e != nil {
-		if err != nil {
-			err = e
-		}
-	}
-	if err != nil {
-		return fmt.Errorf("could not close REPL: %w", err)
-	}
-
-	return nil
-}
-
-func (c *Cmd) Run() error {
-	for {
-		o, err := c.rl.Prompt("paw> ")
-		if err != nil {
-			if err == io.EOF {
-				_, _ = c.msg.Writer().Write([]byte("\n"))
-				err = nil
-			}
-			return err
-		}
-		//fmt.Printf("<@ %q\n", o)
-		if o == "" {
-			continue
-		}
-		err = c.exec(o)
-		if err != nil {
-			if err == io.EOF {
-				return err
-			}
-			c.msg.Printf("error: %v\n", err)
-		}
-		c.rl.AppendHistory(o)
-	}
-}
-
-func (c *Cmd) RunScript(r io.Reader) error {
-	scan := bufio.NewScanner(r)
-	for scan.Scan() {
-		err := scan.Err()
-		if err != nil {
-			break
-		}
-		line := scan.Text()
-		if line == "" || line[0] == '#' {
-			continue
-		}
-		fmt.Fprintf(c.msg.Writer(), "# %s\n", line)
-		err = c.exec(line)
-		if err == io.EOF {
-			return err
-		}
-		if err != nil {
-			c.msg.Printf("error executing %q: %v\n", line, err)
-			return err
-		}
-	}
-
-	err := scan.Err()
-	if err == io.EOF {
-		err = nil
-	}
-	return err
-}
-
-func (c *Cmd) exec(line string) error {
-	args, err := shlex.Split(line)
-	if err != nil {
-		return fmt.Errorf("paw: splitting line failed: %w", err)
-	}
-	cmd, ok := c.cmds[args[0]]
-	if !ok {
-		return fmt.Errorf("unknown command %q", args[0])
-	}
-	err = cmd.Run(args[1:])
-	return err
-}
diff --git a/pawgo/cmd_file.go b/pawgo/cmd_file.go
deleted file mode 100644
index 72ae7ee95..000000000
--- a/pawgo/cmd_file.go
+++ /dev/null
@@ -1,150 +0,0 @@
-// Copyright ©2015 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
-	"fmt"
-	"io"
-	"path/filepath"
-	"strings"
-
-	"github.com/google/shlex"
-)
-
-// cmdFileOpen opens a file for read access
-type cmdFileOpen struct {
-	ctx *Cmd
-}
-
-func (cmd *cmdFileOpen) Name() string {
-	return "/file/open"
-}
-
-func (cmd *cmdFileOpen) Run(args []string) error {
-	var err error
-	id := args[0]
-	fname := args[1]
-	err = cmd.ctx.fmgr.open(id, fname)
-	return err
-}
-
-func (cmd *cmdFileOpen) Help(w io.Writer) {
-	fmt.Fprintf(w, "%s \t-- open file for read access\n", cmd.Name())
-}
-
-func (cmd *cmdFileOpen) Complete(line string) []string {
-	var o []string
-	args, err := shlex.Split(line)
-	if err != nil {
-		cmd.ctx.msg.Printf("error splitting line: %v\n", err)
-		return o
-	}
-	switch len(args) {
-	case 0:
-		return o
-	case 1:
-		// fmt.Printf(">>> %q\n", args[0])
-	case 2:
-		// fmt.Printf("### %q %q\n", args[0], args[1])
-	case 3:
-		// fmt.Printf("+++ %q %q %q\n", args[0], args[1], args[2])
-		if args[2] != "" {
-			matches, err := filepath.Glob(args[2] + "*")
-			//fmt.Printf(">>> matches: %v\nerr=%v\n", matches, err)
-			if err != nil {
-				return o
-			}
-			for _, m := range matches {
-				mm := strings.Trim(m, "\t\n\r ")
-				if mm != "" {
-					args[2] = mm
-					o = append(o, strings.Join(args, " "))
-				}
-			}
-		}
-	}
-
-	return o
-}
-
-// cmdFileCreate creates a file for write access
-type cmdFileCreate struct {
-	ctx *Cmd
-}
-
-func (cmd *cmdFileCreate) Name() string {
-	return "/file/create"
-}
-
-func (cmd *cmdFileCreate) Run(args []string) error {
-	var err error
-	id := args[0]
-	fname := args[1]
-	err = cmd.ctx.fmgr.create(id, fname)
-	return err
-}
-
-func (cmd *cmdFileCreate) Help(w io.Writer) {
-	fmt.Fprintf(w, "%s \t-- create file for write access\n", cmd.Name())
-}
-
-func (cmd *cmdFileCreate) Complete(line string) []string {
-	var o []string
-	return o
-}
-
-// cmdFileClose closes a file
-type cmdFileClose struct {
-	ctx *Cmd
-}
-
-func (cmd *cmdFileClose) Name() string {
-	return "/file/close"
-}
-
-func (cmd *cmdFileClose) Run(args []string) error {
-	var err error
-	id := args[0]
-	err = cmd.ctx.fmgr.close(id)
-	return err
-}
-
-func (cmd *cmdFileClose) Help(w io.Writer) {
-	fmt.Fprintf(w, "%s \t-- close a file\n", cmd.Name())
-}
-
-func (cmd *cmdFileClose) Complete(line string) []string {
-	var o []string
-	return o
-}
-
-// cmdFileList closes a file
-type cmdFileList struct {
-	ctx *Cmd
-}
-
-func (cmd *cmdFileList) Name() string {
-	return "/file/ls"
-}
-
-func (cmd *cmdFileList) Run(args []string) error {
-	switch len(args) {
-	case 0:
-		return cmd.ctx.fmgr.ls("")
-	case 1:
-		return cmd.ctx.fmgr.ls(args[0])
-	default:
-		return fmt.Errorf("%s: need at most 1 file id", cmd.Name())
-	}
-}
-
-func (cmd *cmdFileList) Help(w io.Writer) {
-	fmt.Fprintf(w, "%s \t-- list a file's content\n", cmd.Name())
-}
-
-func (cmd *cmdFileList) Complete(line string) []string {
-	var o []string
-	return o
-}
diff --git a/pawgo/cmd_help.go b/pawgo/cmd_help.go
deleted file mode 100644
index da07b9632..000000000
--- a/pawgo/cmd_help.go
+++ /dev/null
@@ -1,72 +0,0 @@
-// Copyright ©2015 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
-	"fmt"
-	"io"
-	"sort"
-	"strings"
-	"text/tabwriter"
-)
-
-// cmdHelp prints the help
-type cmdHelp struct {
-	ctx *Cmd
-}
-
-func (cmd *cmdHelp) Name() string {
-	return "/?"
-}
-
-func (cmd *cmdHelp) Run(args []string) error {
-	var err error
-	switch len(args) {
-	case 0:
-		var cmds []string
-		for k := range cmd.ctx.cmds {
-			cmds = append(cmds, k)
-		}
-		sort.Strings(cmds)
-		w := tabwriter.NewWriter(cmd.ctx.msg.Writer(), 0, 8, 0, '\t', 0)
-		for _, k := range cmds {
-			c := cmd.ctx.cmds[k]
-			c.Help(w)
-		}
-		w.Flush()
-	case 1:
-		c, ok := cmd.ctx.cmds[args[0]]
-		if !ok {
-			return fmt.Errorf("unknown command %q", args[0])
-		}
-		w := tabwriter.NewWriter(cmd.ctx.msg.Writer(), 0, 8, 0, '\t', 0)
-		c.Help(w)
-		w.Flush()
-	}
-	return err
-}
-
-func (cmd *cmdHelp) Help(w io.Writer) {
-	fmt.Fprintf(w, "%s \t-- print help\n", cmd.Name())
-}
-
-func (cmd *cmdHelp) Complete(line string) []string {
-	var o []string
-	args := strings.Split(line, " ")
-	switch len(args) {
-	case 0, 1:
-		return o
-	case 2:
-		if args[1] == "" {
-			args[1] = "/"
-		}
-		for k := range cmd.ctx.cmds {
-			if strings.HasPrefix(k, args[1]) {
-				o = append(o, strings.Join(args[:1], " ")+" "+k)
-			}
-		}
-	}
-	return o
-}
diff --git a/pawgo/cmd_hist.go b/pawgo/cmd_hist.go
deleted file mode 100644
index 8a3c041c1..000000000
--- a/pawgo/cmd_hist.go
+++ /dev/null
@@ -1,121 +0,0 @@
-// Copyright ©2015 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
-	"fmt"
-	"io"
-	"strings"
-)
-
-// cmdHistOpen opens a histogram
-type cmdHistOpen struct {
-	ctx *Cmd
-}
-
-func (cmd *cmdHistOpen) Name() string {
-	return "/hist/open"
-}
-
-func (cmd *cmdHistOpen) Run(args []string) error {
-	if len(args) < 2 {
-		return fmt.Errorf("%s: need histo-id and histo-name (got=%v)", cmd.Name(), args)
-	}
-
-	hid := args[0]
-
-	// e.g: /file/id/1/my-histo
-	hname := args[1]
-
-	return cmd.ctx.hmgr.open(cmd.ctx.fmgr, hid, hname)
-}
-
-func (cmd *cmdHistOpen) Help(w io.Writer) {
-	fmt.Fprintf(w, "%s \t-- open a histogram\n", cmd.Name())
-}
-
-func (cmd *cmdHistOpen) Complete(line string) []string {
-	var o []string
-	args := strings.Split(line, " ")
-	switch len(args) {
-	case 0, 1:
-		return o
-	case 2:
-		return o
-	case 3:
-		if args[2] == "" {
-			args[2] = "/file/id/"
-		}
-		for id := range cmd.ctx.fmgr.rfds {
-			switch {
-			case strings.HasPrefix("/file/id/"+id+"/", args[2]):
-				r := cmd.ctx.fmgr.rfds[id]
-				v := "/file/id/" + id + "/"
-				for _, k := range r.rio.Keys() {
-					if strings.HasPrefix(v+k.Name, args[2]) {
-						o = append(o, strings.Join(args[:2], " ")+" "+v+k.Name)
-					}
-				}
-			case strings.HasPrefix("/file/id/"+id, args[2]):
-				o = append(o, strings.Join(args[:2], " ")+" /file/id/"+id)
-			}
-		}
-	}
-	return o
-}
-
-// cmdHistPlot plots a histogram
-type cmdHistPlot struct {
-	ctx *Cmd
-}
-
-func (cmd *cmdHistPlot) Name() string {
-	return "/hist/plot"
-}
-
-func (cmd *cmdHistPlot) Run(args []string) error {
-	if len(args) < 1 {
-		return fmt.Errorf("%s: need a histo-id to plot", cmd.Name())
-	}
-
-	hid := args[0]
-	_, err := cmd.ctx.hmgr.plot(cmd.ctx.fmgr, cmd.ctx.wmgr, hid)
-	if err != nil {
-		return fmt.Errorf("could not plot histo %s: %w", hid, err)
-	}
-	return nil
-}
-
-func (cmd *cmdHistPlot) Help(w io.Writer) {
-	fmt.Fprintf(w, "%s \t-- plot a histogram\n", cmd.Name())
-}
-
-func (cmd *cmdHistPlot) Complete(line string) []string {
-	var o []string
-	args := strings.Split(line, " ")
-	switch len(args) {
-	case 0, 1:
-		return o
-	case 2:
-		if strings.HasPrefix(args[1], "/") {
-			for id, r := range cmd.ctx.fmgr.rfds {
-				for _, k := range r.rio.Keys() {
-					name := "/file/id/" + id + "/" + k.Name
-					if strings.HasPrefix(name, args[1]) {
-						o = append(o, args[0]+" "+name)
-					}
-				}
-			}
-			return o
-		}
-		for k := range cmd.ctx.hmgr.hmap {
-			if strings.HasPrefix(k, args[1]) {
-				o = append(o, args[0]+" "+k)
-			}
-		}
-		return o
-	}
-	return o
-}
diff --git a/pawgo/cmd_quit.go b/pawgo/cmd_quit.go
deleted file mode 100644
index 5e8f90e93..000000000
--- a/pawgo/cmd_quit.go
+++ /dev/null
@@ -1,32 +0,0 @@
-// Copyright ©2016 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
-	"fmt"
-	"io"
-)
-
-// cmdQuit exits the application.
-type cmdQuit struct {
-	ctx *Cmd
-}
-
-func (cmd *cmdQuit) Name() string {
-	return "/quit"
-}
-
-func (cmd *cmdQuit) Run(args []string) error {
-	return io.EOF
-}
-
-func (cmd *cmdQuit) Help(w io.Writer) {
-	fmt.Fprintf(w, "%s \t-- quit PAW-Go\n", cmd.Name())
-}
-
-func (cmd *cmdQuit) Complete(line string) []string {
-	var o []string
-	return o
-}
diff --git a/pawgo/cmd_shell.go b/pawgo/cmd_shell.go
deleted file mode 100644
index 64f187df6..000000000
--- a/pawgo/cmd_shell.go
+++ /dev/null
@@ -1,66 +0,0 @@
-// Copyright ©2016 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
-	"fmt"
-	"io"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"strings"
-
-	"github.com/google/shlex"
-)
-
-// cmdShell runs a shell command.
-type cmdShell struct {
-	ctx *Cmd
-}
-
-func (cmd *cmdShell) Name() string {
-	return "/!"
-}
-
-func (cmd *cmdShell) Run(args []string) error {
-	sh := exec.Command(args[0], args[1:]...)
-	sh.Stdin = os.Stdin
-	sh.Stdout = cmd.ctx.msg.Writer()
-	sh.Stderr = cmd.ctx.msg.Writer()
-	return sh.Run()
-}
-
-func (cmd *cmdShell) Help(w io.Writer) {
-	fmt.Fprintf(w, "%s \t-- run a shell command\n", cmd.Name())
-}
-
-func (cmd *cmdShell) Complete(line string) []string {
-	var o []string
-	args, err := shlex.Split(line)
-	if err != nil {
-		cmd.ctx.msg.Printf("error splitting line: %v\n", err)
-		return o
-	}
-	if len(args) < 2 {
-		return o
-	}
-	i := len(args) - 1
-	if args[i] != "" {
-		matches, err := filepath.Glob(args[i] + "*")
-		//fmt.Printf(">>> matches: %v\nerr=%v\n", matches, err)
-		if err != nil {
-			return o
-		}
-		for _, m := range matches {
-			mm := strings.Trim(m, "\t\n\r ")
-			if mm != "" {
-				args[i] = mm
-				o = append(o, strings.Join(args, " "))
-			}
-		}
-	}
-
-	return o
-}
diff --git a/pawgo/fmgr.go b/pawgo/fmgr.go
deleted file mode 100644
index a48e6ee9d..000000000
--- a/pawgo/fmgr.go
+++ /dev/null
@@ -1,242 +0,0 @@
-// Copyright ©2017 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
-	"fmt"
-	"io"
-	"log"
-	"os"
-	"text/tabwriter"
-
-	"go-hep.org/x/hep/rio"
-)
-
-type fileType interface {
-	io.Reader
-	io.Seeker
-	io.Closer
-}
-
-type rfile struct {
-	id  string
-	n   string
-	r   fileType
-	rio *rio.File
-}
-
-func (r *rfile) open(fname string) error {
-	var err error
-
-	r.n = fname
-	r.r, err = os.Open(fname)
-	if err != nil {
-		return err
-	}
-
-	r.rio, err = rio.Open(r.r)
-	if err != nil {
-		return err
-	}
-
-	return err
-}
-
-func (r *rfile) ls(o io.Writer) error {
-	var err error
-
-	fmt.Fprintf(o, "/file/id/%s name=%s\n", r.id, r.n)
-	w := tabwriter.NewWriter(o, 0, 8, 0, '\t', 0)
-	for _, k := range r.rio.Keys() {
-		fmt.Fprintf(w, " \t- %s\t(type=%q)\n", k.Name, k.Blocks[0].Type)
-	}
-	w.Flush()
-	fmt.Fprintf(o, "\n")
-
-	return err
-}
-
-func (r *rfile) typ(name string) string {
-	for _, k := range r.rio.Keys() {
-		if k.Name == name {
-			return k.Blocks[0].Type
-		}
-	}
-
-	return ""
-}
-
-func (r *rfile) read(name string, ptr interface{}) error {
-	var err error
-
-	// FIXME(sbinet): when/if "rio" gets the concept of directories,
-	// handle this there.
-	if !r.rio.Has(name) {
-		return fmt.Errorf("no record [%s] in file [id=%s name=%s]", name, r.id, r.n)
-	}
-
-	err = r.rio.Get(name, ptr)
-	if err != nil {
-		return err
-	}
-
-	return err
-}
-
-func (r *rfile) close() error {
-	defer r.r.Close()
-	err := r.rio.Close()
-	if err != nil {
-		return err
-	}
-	return r.r.Close()
-}
-
-type wfile struct {
-	id  string
-	n   string
-	w   io.WriteCloser
-	rio *rio.Writer
-}
-
-func (w *wfile) create(fname string) error {
-	var err error
-
-	w.n = fname
-	w.w, err = os.Create(fname)
-	if err != nil {
-		return err
-	}
-
-	w.rio, err = rio.NewWriter(w.w)
-	if err != nil {
-		return err
-	}
-
-	return err
-}
-
-func (w *wfile) close() error {
-	defer w.w.Close()
-	err := w.rio.Close()
-	if err != nil {
-		return err
-	}
-	return w.w.Close()
-}
-
-type fileMgr struct {
-	msg  *log.Logger
-	rfds map[string]rfile
-	wfds map[string]wfile
-}
-
-func newFileMgr(msg *log.Logger) *fileMgr {
-	return &fileMgr{
-		msg:  msg,
-		rfds: make(map[string]rfile),
-		wfds: make(map[string]wfile),
-	}
-}
-
-func (mgr *fileMgr) open(id string, fname string) error {
-	var err error
-	r, dup := mgr.rfds[id]
-	if dup {
-		return fmt.Errorf("paw: file [id=%s name=%s] already open", id, r.n)
-	}
-
-	r.id = id
-	err = r.open(fname)
-	if err != nil {
-		return err
-	}
-
-	mgr.rfds[id] = r
-	return nil
-}
-
-func (mgr *fileMgr) close(id string) error {
-	r, ok := mgr.rfds[id]
-	if ok {
-		delete(mgr.rfds, id)
-		return r.close()
-	}
-
-	w, ok := mgr.wfds[id]
-	if ok {
-		delete(mgr.wfds, id)
-		return w.close()
-	}
-
-	return fmt.Errorf("paw: unknown file [id=%s]", id)
-}
-
-func (mgr *fileMgr) ls(id string) error {
-	if id == "" {
-		// list all
-		for id := range mgr.rfds {
-			err := mgr.ls(id)
-			if err != nil {
-				return err
-			}
-		}
-		return nil
-	}
-
-	r, ok := mgr.rfds[id]
-	if !ok {
-		return fmt.Errorf("paw: unknown file [id=%s]", id)
-	}
-
-	err := r.ls(mgr.msg.Writer())
-	if err != nil {
-		return err
-	}
-
-	return err
-}
-
-func (mgr *fileMgr) create(id string, fname string) error {
-	var err error
-	w, dup := mgr.wfds[id]
-	if dup {
-		return fmt.Errorf("paw: file [id=%s name=%s] already open", id, w.n)
-	}
-
-	w.id = id
-	err = w.create(fname)
-	if err != nil {
-		return err
-	}
-
-	mgr.wfds[id] = w
-	return nil
-}
-
-func (mgr *fileMgr) Close() error {
-	var err error
-	for k, r := range mgr.rfds {
-		e := r.close()
-		if e != nil {
-			mgr.msg.Printf("error closing file [%s]: %v\n", k, e)
-			if err != nil {
-				err = e
-			}
-		}
-	}
-
-	for k, w := range mgr.wfds {
-		e := w.close()
-		if e != nil {
-			mgr.msg.Printf("error closing file [%s]: %v\n", k, e)
-			if err != nil {
-				err = e
-			}
-		}
-	}
-
-	return err
-}
diff --git a/pawgo/gen.hsimple.rio.go b/pawgo/gen.hsimple.rio.go
deleted file mode 100644
index 6d09be13c..000000000
--- a/pawgo/gen.hsimple.rio.go
+++ /dev/null
@@ -1,143 +0,0 @@
-// Copyright ©2020 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build ignore
-
-package main
-
-import (
-	"log"
-	"os"
-
-	"go-hep.org/x/hep/hbook"
-	"go-hep.org/x/hep/rio"
-	"golang.org/x/exp/rand"
-	"gonum.org/v1/gonum/mat"
-	"gonum.org/v1/gonum/stat/distmv"
-	"gonum.org/v1/gonum/stat/distuv"
-)
-
-func main() {
-	h1 := genH1()
-	h2 := genH2()
-	s2 := genS2()
-	p1 := genP1()
-
-	f, err := os.Create("testdata/hsimple.rio")
-	if err != nil {
-		log.Fatalf("could not create file: %+v", err)
-	}
-	defer f.Close()
-
-	w, err := rio.NewWriter(f)
-	if err != nil {
-		log.Fatalf("could not create rio writer: %+v", err)
-	}
-
-	for _, v := range []struct {
-		name  string
-		value interface{}
-	}{
-		{"h1", h1},
-		{"h2", h2},
-		{"s2", s2},
-		{"p1", p1},
-	} {
-		err = w.WriteValue(v.name, v.value)
-		if err != nil {
-			log.Fatalf("could not write %q: %+v", v.name, err)
-		}
-	}
-
-	err = w.Close()
-	if err != nil {
-		log.Fatalf("could not close rio writer: %+v", err)
-	}
-
-	err = f.Close()
-	if err != nil {
-		log.Fatalf("could not close file: %+v", err)
-	}
-}
-
-func genH1() *hbook.H1D {
-	const npoints = 10000
-
-	// Create a normal distribution.
-	dist := distuv.Normal{
-		Mu:    0,
-		Sigma: 1,
-		Src:   rand.New(rand.NewSource(0)),
-	}
-
-	// Draw some random values from the standard
-	// normal distribution.
-	h := hbook.NewH1D(20, -4, +4)
-	for i := 0; i < npoints; i++ {
-		v := dist.Rand()
-		h.Fill(v, 1)
-	}
-
-	return h
-}
-
-func genH2() *hbook.H2D {
-	h := hbook.NewH2D(100, -10, 10, 100, -10, 10)
-
-	const npoints = 10000
-
-	dist, ok := distmv.NewNormal(
-		[]float64{0, 1},
-		mat.NewSymDense(2, []float64{4, 0, 0, 2}),
-		rand.New(rand.NewSource(1234)),
-	)
-	if !ok {
-		log.Fatalf("error creating distmv.Normal")
-	}
-
-	v := make([]float64, 2)
-	// Draw some random values from the standard
-	// normal distribution.
-	for i := 0; i < npoints; i++ {
-		v = dist.Rand(v)
-		h.Fill(v[0], v[1], 1)
-	}
-
-	return h
-}
-
-func genS2() *hbook.S2D {
-	s := hbook.NewS2D(hbook.Point2D{X: 1, Y: 1}, hbook.Point2D{X: 2, Y: 1.5}, hbook.Point2D{X: -1, Y: +2})
-	if s == nil {
-		log.Fatal("nil pointer to S2D")
-	}
-
-	s.Fill(hbook.Point2D{X: 10, Y: -10, ErrX: hbook.Range{Min: 5, Max: 5}, ErrY: hbook.Range{Min: 6, Max: 6}})
-
-	return s
-}
-
-func genP1() *hbook.P1D {
-	const npoints = 1000
-
-	p := hbook.NewP1D(100, -10, 10)
-	dist, ok := distmv.NewNormal(
-		[]float64{0, 1},
-		mat.NewSymDense(2, []float64{4, 0, 0, 2}),
-		rand.New(rand.NewSource(1234)),
-	)
-	if !ok {
-		log.Fatalf("error creating distmv.Normal")
-	}
-
-	v := make([]float64, 2)
-	// Draw some random values from the standard
-	// normal distribution.
-	for i := 0; i < npoints; i++ {
-		v = dist.Rand(v)
-		p.Fill(v[0], v[1], 1)
-	}
-
-	return p
-}
diff --git a/pawgo/hmgr.go b/pawgo/hmgr.go
deleted file mode 100644
index 36d7dca15..000000000
--- a/pawgo/hmgr.go
+++ /dev/null
@@ -1,161 +0,0 @@
-// Copyright ©2017 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
-	"fmt"
-	"log"
-	"strings"
-
-	"go-hep.org/x/hep/hbook"
-	"go-hep.org/x/hep/hplot"
-)
-
-type histMgr struct {
-	msg  *log.Logger
-	hmap map[string]hbook.Histogram
-}
-
-func newHistMgr(msg *log.Logger) *histMgr {
-	return &histMgr{
-		msg:  msg,
-		hmap: make(map[string]hbook.Histogram),
-	}
-}
-
-func (mgr *histMgr) find(fmgr *fileMgr, path string) (hbook.Histogram, error) {
-	var err error
-	const prefix = "/file/id/"
-	if !strings.HasPrefix(path, prefix) {
-		return nil, fmt.Errorf("invalid path [%s] (missing prefix [%s])", path, prefix)
-	}
-
-	var toks []string
-	for _, tok := range strings.Split(path[len(prefix):], "/") {
-		tok = strings.TrimSpace(tok)
-		if tok == "" {
-			continue
-		}
-		toks = append(toks, tok)
-	}
-
-	if len(toks) < 2 {
-		return nil, fmt.Errorf("invalid path [%s] (missing file-id and histo-name)", path)
-	}
-
-	fid := toks[0]
-
-	r, ok := fmgr.rfds[fid]
-	if !ok {
-		return nil, fmt.Errorf("unknown file-id [%s]", fid)
-	}
-
-	hname := strings.Join(toks[1:], "/")
-
-	switch r.typ(hname) {
-	case "*go-hep.org/x/hep/hbook.H1D":
-		var h1 hbook.H1D
-		err = r.read(hname, &h1)
-		if err != nil {
-			return nil, err
-		}
-		return &h1, nil
-
-	case "*go-hep.org/x/hep/hbook.H2D":
-		var h2 hbook.H2D
-		err = r.read(hname, &h2)
-		if err != nil {
-			return nil, err
-		}
-		return &h2, nil
-
-	default:
-		return nil, fmt.Errorf("%q not an histogram (%s)", path, r.typ(hname))
-	}
-}
-
-func (mgr *histMgr) open(fmgr *fileMgr, hid, path string) error {
-	h, err := mgr.find(fmgr, path)
-	if err != nil {
-		return err
-	}
-	mgr.hmap[hid] = h
-	return nil
-}
-
-func (mgr *histMgr) plot(fmgr *fileMgr, wmgr *winMgr, hid string) (*window, error) {
-	var (
-		h   hbook.Histogram
-		err error
-	)
-	if strings.HasPrefix(hid, "/file/id/") {
-		// directly plot from file
-		h, err = mgr.find(fmgr, hid)
-		if err != nil {
-			return nil, err
-		}
-	} else {
-		var ok bool
-		h, ok = mgr.hmap[hid]
-		if !ok {
-			return nil, fmt.Errorf("unknown histogram [id=%s]", hid)
-		}
-	}
-
-	switch h := h.(type) {
-	case *hbook.H1D:
-		return mgr.plotH1D(wmgr, h)
-	case *hbook.H2D:
-		return mgr.plotH2D(wmgr, h)
-	}
-
-	return nil, fmt.Errorf("unknown histogram type %T [id=%s]", h, hid)
-}
-
-func (mgr *histMgr) plotH1D(wmgr *winMgr, h *hbook.H1D) (*window, error) {
-	fmt.Fprintf(
-		mgr.msg.Writer(),
-		"== h1d: name=%q\nentries=%d\nmean=%+8.3f\nRMS= %+8.3f\n",
-		h.Name(), h.Entries(), h.XMean(), h.XRMS(),
-	)
-
-	p := hplot.New()
-	p.Title.Text = h.Name()
-	p.X.Label.Text = "x"
-	p.Y.Label.Text = "y"
-
-	hh := hplot.NewH1D(h)
-	hh.Infos.Style = hplot.HInfoSummary
-
-	p.Add(hh)
-	p.Add(hplot.NewGrid())
-
-	win := wmgr.newPlot(p)
-	return win, nil
-}
-
-func (mgr *histMgr) plotH2D(wmgr *winMgr, h *hbook.H2D) (*window, error) {
-	fmt.Fprintf(
-		mgr.msg.Writer(),
-		"== h2d: name=%q\nentries=%d\nxmean=%+8.3f\nxRMS= %+8.3f\nymean=%+8.3f\nyRMS= %+8.3f\n",
-		h.Name(), h.Entries(),
-		h.XMean(), h.XRMS(),
-		h.YMean(), h.YRMS(),
-	)
-
-	p := hplot.New()
-	p.Title.Text = h.Name()
-	p.X.Label.Text = "x"
-	p.Y.Label.Text = "y"
-
-	hh := hplot.NewH2D(h, nil)
-	hh.Infos.Style = hplot.HInfoNone
-
-	p.Add(hh)
-	p.Add(hplot.NewGrid())
-
-	win := wmgr.newPlot(p)
-	return win, nil
-}
diff --git a/pawgo/main.go b/pawgo/main.go
deleted file mode 100644
index df001d949..000000000
--- a/pawgo/main.go
+++ /dev/null
@@ -1,116 +0,0 @@
-// Copyright ©2015 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// pawgo is a simple interactive shell to quickly plot hbook histograms from
-// rio files.
-//
-// Example:
-//
-//	$> pawgo
-//	paw> /file/open f testdata/issue-120.rio
-//	paw> /file/ls f
-//	/file/id/f name=testdata/issue-120.rio
-//	 	- MonoH_Truth/jets	(type="*go-hep.org/x/hep/hbook.H1D")
-//
-//	paw> /hist/open h /file/id/f/MonoH_Truth/jets
-//	paw> /hist/plot h
-//	== h1d: name="MonoH_Truth/jets"
-//	entries=20000
-//	mean=  +2.554
-//	RMS=   +2.891
-//	paw> /?
-//	/! 		-- run a shell command
-//	/? 		-- print help
-//	/file/close 	-- close a file
-//	/file/create 	-- create file for write access
-//	/file/list 	-- list a file's content
-//	/file/open 	-- open file for read access
-//	/hist/open 	-- open a histogram
-//	/hist/plot 	-- plot a histogram
-//	/quit 		-- quit PAW-Go
-package main // import "go-hep.org/x/hep/pawgo"
-
-//go:generate go run ./gen.hsimple.go
-
-import (
-	"flag"
-	"fmt"
-	"io"
-	"os"
-)
-
-func main() {
-	interactive := flag.Bool(
-		"i", false,
-		"enable interactive mode: drop into PAW-Go prompt after processing script files",
-	)
-
-	flag.Parse()
-
-	go func() {
-		rc := xmain(os.Stdout, *interactive, flag.Args())
-		os.Exit(rc)
-	}()
-
-	appMain()
-}
-
-func xmain(stdout io.Writer, interactive bool, args []string) int {
-
-	fmt.Fprintf(stdout, `
-:::::::::::::::::::::::::::::
-:::   Welcome to PAW-Go   :::
-:::::::::::::::::::::::::::::
-
-Type /? for help.
-^D or /quit to quit.
-
-`)
-
-	icmd := newCmd(stdout)
-	defer icmd.Close()
-	defer fmt.Fprintf(stdout, "bye.\n")
-
-	if len(args) > 0 {
-		for _, fname := range args {
-			rc := func(fname string) int {
-				f, err := os.Open(fname)
-				if err != nil {
-					icmd.msg.Printf("error: %+v\n", err)
-					return 1
-				}
-				defer f.Close()
-
-				err = icmd.RunScript(f)
-				if err == io.EOF {
-					return 0
-				}
-				if err != nil {
-					icmd.msg.Printf("error running script [%s]: %+v\n", f.Name(), err)
-					return 1
-				}
-
-				return 0
-			}(fname)
-
-			if rc != 0 {
-				return rc
-			}
-		}
-		if !interactive {
-			return 0
-		}
-	}
-
-	err := icmd.Run()
-	if err == io.EOF {
-		err = nil
-	}
-	if err != nil {
-		icmd.msg.Printf("error running interpreter: %v\n", err)
-		return 1
-	}
-
-	return 0
-}
diff --git a/pawgo/main_test.go b/pawgo/main_test.go
deleted file mode 100644
index 92263ecc8..000000000
--- a/pawgo/main_test.go
+++ /dev/null
@@ -1,295 +0,0 @@
-// Copyright ©2020 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
-	"bytes"
-	"os"
-	"path"
-	"runtime"
-	"testing"
-
-	"github.com/google/go-cmp/cmp"
-)
-
-func TestPawgo(t *testing.T) {
-	var (
-		stdout      = new(bytes.Buffer)
-		interactive bool
-		args        []string
-	)
-
-	rc := xmain(stdout, interactive, args)
-	if rc != 0 {
-		t.Fatalf("invalid exit-code: %d", rc)
-	}
-}
-
-func TestPawgoScript(t *testing.T) {
-	tmp, err := os.MkdirTemp("", "pawgo-")
-	if err != nil {
-		t.Fatalf("could not create tmpdir: %+v", err)
-	}
-	defer os.RemoveAll(tmp)
-
-	for _, tc := range []struct {
-		name        string
-		script      string
-		want        string
-		interactive bool
-	}{
-		{
-			name: "basic",
-			script: `## comment
-
-## open the rio file hsimple.rio, assign it the variable name 'f'
-/file/open f ./testdata/hsimple.rio
-
-## list the content of the rio file 'f'
-/file/ls f
-
-## open the hbook.H1D histogram 'h1' from file 'f', assign it the variable name 'h'
-/hist/open h /file/id/f/h1
-
-/file/close f
-`,
-			want: `
-:::::::::::::::::::::::::::::
-:::   Welcome to PAW-Go   :::
-:::::::::::::::::::::::::::::
-
-Type /? for help.
-^D or /quit to quit.
-
-# /file/open f ./testdata/hsimple.rio
-# /file/ls f
-/file/id/f name=./testdata/hsimple.rio
- 	- h1	(type="*go-hep.org/x/hep/hbook.H1D")
- 	- h2	(type="*go-hep.org/x/hep/hbook.H2D")
- 	- p1	(type="*go-hep.org/x/hep/hbook.P1D")
- 	- s2	(type="*go-hep.org/x/hep/hbook.S2D")
-
-# /hist/open h /file/id/f/h1
-# /file/close f
-bye.
-`,
-			interactive: false,
-		},
-		{
-			name:   "help",
-			script: "/?\n/? /file/open",
-			want: `
-:::::::::::::::::::::::::::::
-:::   Welcome to PAW-Go   :::
-:::::::::::::::::::::::::::::
-
-Type /? for help.
-^D or /quit to quit.
-
-# /?
-/! 		-- run a shell command
-/? 		-- print help
-/file/close 	-- close a file
-/file/create 	-- create file for write access
-/file/ls 	-- list a file's content
-/file/open 	-- open file for read access
-/hist/open 	-- open a histogram
-/hist/plot 	-- plot a histogram
-/quit 		-- quit PAW-Go
-# /? /file/open
-/file/open 	-- open file for read access
-bye.
-`,
-			interactive: false,
-		},
-		{
-			name:   "quit",
-			script: "/quit\n",
-			want: `
-:::::::::::::::::::::::::::::
-:::   Welcome to PAW-Go   :::
-:::::::::::::::::::::::::::::
-
-Type /? for help.
-^D or /quit to quit.
-
-# /quit
-bye.
-`,
-			interactive: false,
-		},
-		{
-			name: "hplot-cmd",
-			script: `## comment
-
-/file/open f ./testdata/hsimple.rio
-/hist/open h1 /file/id/f/h1
-/hist/plot h1
-/hist/open h2 /file/id/f/h2
-/hist/plot h2
-/quit
-`,
-			want: `
-:::::::::::::::::::::::::::::
-:::   Welcome to PAW-Go   :::
-:::::::::::::::::::::::::::::
-
-Type /? for help.
-^D or /quit to quit.
-
-# /file/open f ./testdata/hsimple.rio
-# /hist/open h1 /file/id/f/h1
-# /hist/plot h1
-== h1d: name=""
-entries=10000
-mean=  +0.004
-RMS=   +1.005
-# /hist/open h2 /file/id/f/h2
-# /hist/plot h2
-== h2d: name=""
-entries=10000
-xmean=  +0.027
-xRMS=   +2.003
-ymean=  +0.992
-yRMS=   +1.723
-# /quit
-bye.
-`,
-			interactive: false,
-		},
-	} {
-		t.Run(tc.name, func(t *testing.T) {
-			var (
-				stdout = new(bytes.Buffer)
-				fname  = path.Join(tmp, tc.name+".paw")
-				args   = []string{fname}
-			)
-
-			err = os.WriteFile(fname, []byte(tc.script), 0644)
-
-			rc := xmain(stdout, tc.interactive, args)
-			if rc != 0 {
-				t.Fatalf("invalid exit-code: %d", rc)
-			}
-
-			if got, want := stdout.String(), tc.want; got != want {
-				t.Fatalf("stdout differ:\n%s\n",
-					cmp.Diff(
-						string(want),
-						string(got),
-					),
-				)
-			}
-		})
-	}
-}
-
-func TestPawgoShellCommand(t *testing.T) {
-	tmp, err := os.MkdirTemp("", "pawgo-")
-	if err != nil {
-		t.Fatalf("could not create tmpdir: %+v", err)
-	}
-	defer os.RemoveAll(tmp)
-
-	var (
-		stdout      = new(bytes.Buffer)
-		interactive bool
-		fname       = path.Join(tmp, "script.paw")
-		args        = []string{fname}
-	)
-
-	script := "/! ls testdata\n"
-	if runtime.GOOS == "windows" {
-		script = "/! dir testdata\n"
-	}
-
-	err = os.WriteFile(fname, []byte(script), 0644)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	rc := xmain(stdout, interactive, args)
-	if rc != 0 {
-		t.Fatalf("invalid exit-code: %d", rc)
-	}
-
-	want := ""
-	switch runtime.GOOS {
-	case "windows":
-		want = `
-:::::::::::::::::::::::::::::
-:::   Welcome to PAW-Go   :::
-:::::::::::::::::::::::::::::
-
-Type /? for help.
-^D or /quit to quit.
-
-# /! dir testdata
-hsimple.rio  issue-120.paw  issue-120.rio  script.paw
-bye.
-`
-
-	default:
-		want = `
-:::::::::::::::::::::::::::::
-:::   Welcome to PAW-Go   :::
-:::::::::::::::::::::::::::::
-
-Type /? for help.
-^D or /quit to quit.
-
-# /! ls testdata
-hsimple.rio
-issue-120.paw
-issue-120.rio
-script.paw
-bye.
-`
-	}
-
-	if got, want := stdout.String(), want; got != want {
-		t.Fatalf("stdout differ:\n%s\n",
-			cmp.Diff(
-				string(want),
-				string(got),
-			),
-		)
-	}
-}
-
-func TestIssue120(t *testing.T) {
-	var (
-		stdout      = new(bytes.Buffer)
-		interactive bool
-		args        = []string{"./testdata/issue-120.paw"}
-	)
-
-	rc := xmain(stdout, interactive, args)
-	if rc != 0 {
-		t.Fatalf("invalid exit-code: %d", rc)
-	}
-
-	want := `
-:::::::::::::::::::::::::::::
-:::   Welcome to PAW-Go   :::
-:::::::::::::::::::::::::::::
-
-Type /? for help.
-^D or /quit to quit.
-
-# /file/open f ./testdata/issue-120.rio
-# /hist/open h /file/id/f/MonoH_Truth/jets
-bye.
-`
-
-	if got, want := stdout.String(), want; got != want {
-		t.Fatalf("stdout differ:\n%s\n",
-			cmp.Diff(
-				string(want),
-				string(got),
-			),
-		)
-	}
-}
diff --git a/pawgo/testdata/hsimple.rio b/pawgo/testdata/hsimple.rio
deleted file mode 100644
index 29690b514..000000000
Binary files a/pawgo/testdata/hsimple.rio and /dev/null differ
diff --git a/pawgo/testdata/issue-120.paw b/pawgo/testdata/issue-120.paw
deleted file mode 100644
index 78dc1be9d..000000000
--- a/pawgo/testdata/issue-120.paw
+++ /dev/null
@@ -1,3 +0,0 @@
-/file/open f ./testdata/issue-120.rio
-/hist/open h /file/id/f/MonoH_Truth/jets
-
diff --git a/pawgo/testdata/issue-120.rio b/pawgo/testdata/issue-120.rio
deleted file mode 100644
index 9ef05f97a..000000000
Binary files a/pawgo/testdata/issue-120.rio and /dev/null differ
diff --git a/pawgo/testdata/script.paw b/pawgo/testdata/script.paw
deleted file mode 100644
index f3291cfd4..000000000
--- a/pawgo/testdata/script.paw
+++ /dev/null
@@ -1,21 +0,0 @@
-## a simple PAW-Go test script
-
-## /! runs a shell command
-/! ls ./testdata
-
-## open the rio file hsimple.rio, assign it the variable name 'f'
-/file/open f ./testdata/hsimple.rio
-
-## list the content of the rio file 'f'
-/file/ls f
-
-## open the hbook.H1D histogram 'h1' from file 'f', assign it the variable name 'h'
-/hist/open h /file/id/f/h1
-
-## plot the hbook.H1D histogram 'h'
-/hist/plot h
-
-## leaving /quit uncommented will make PAW-Go exit
-# /quit
-
-## EOF
diff --git a/pawgo/wmgr.go b/pawgo/wmgr.go
deleted file mode 100644
index 647feaa5f..000000000
--- a/pawgo/wmgr.go
+++ /dev/null
@@ -1,156 +0,0 @@
-// Copyright ©2017 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build !cross_compile
-
-package main
-
-import (
-	"log"
-	"math"
-	"sync"
-
-	"gioui.org/app"
-	"gioui.org/io/event"
-	"gioui.org/io/key"
-	"gioui.org/io/system"
-	"gioui.org/layout"
-	"gioui.org/op"
-	"gioui.org/op/clip"
-	"gioui.org/unit"
-	"go-hep.org/x/hep/hplot"
-	"gonum.org/v1/plot/vg"
-	"gonum.org/v1/plot/vg/draw"
-	"gonum.org/v1/plot/vg/vggio"
-)
-
-const (
-	xmax = vg.Length(400)
-	ymax = vg.Length(400 / math.Phi)
-	dpi  = vggio.DefaultDPI // FIXME(sbinet): remove?
-)
-
-type winMgr struct {
-	msg  *log.Logger
-	quit chan int
-	once sync.Once
-	wg   sync.WaitGroup
-}
-
-func newWinMgr(msg *log.Logger) *winMgr {
-	return &winMgr{
-		msg:  msg,
-		quit: make(chan int),
-	}
-}
-
-func (wmgr *winMgr) Close() error {
-	wmgr.once.Do(wmgr.doClose)
-	return nil
-}
-
-func (wmgr *winMgr) doClose() {
-	close(wmgr.quit)
-}
-
-func (wmgr *winMgr) newPlot(p *hplot.Plot) *window {
-	wmgr.wg.Add(1)
-	win := newWindow(p)
-	go win.run(wmgr)
-	return win
-}
-
-type window struct {
-	w     *app.Window
-	keys  key.Set
-	ready chan int
-
-	mu  sync.Mutex
-	plt *hplot.Plot
-}
-
-func newWindow(p *hplot.Plot) *window {
-	title := p.Plot.Title.Text
-	switch title {
-	case "":
-		title = "PAW-Go"
-	default:
-		title = "PAW-Go [" + title + "]"
-	}
-
-	x := unit.Dp(float32(xmax.Dots(dpi)))
-	y := unit.Dp(float32(ymax.Dots(dpi)))
-
-	win := &window{
-		w:     app.NewWindow(app.Title(title), app.Size(x, y)),
-		keys:  key.NameEscape + "|Q",
-		plt:   p,
-		ready: make(chan int),
-	}
-	return win
-}
-
-func (w *window) run(wmgr *winMgr) {
-	defer wmgr.wg.Done()
-	close(w.ready)
-
-	for {
-		select {
-		case e := <-w.w.Events():
-			o := w.handle(e)
-			if o == winStop {
-				return
-			}
-		case <-wmgr.quit:
-			return
-		}
-	}
-}
-
-type winState byte
-
-const (
-	winContinue winState = iota
-	winStop
-)
-
-func (w *window) handle(e event.Event) winState {
-	switch e := e.(type) {
-	case system.DestroyEvent:
-		return winStop
-	case system.FrameEvent:
-		var (
-			ops op.Ops
-			gtx = layout.NewContext(&ops, e)
-		)
-		// register a global key listener for the escape key wrapping our entire UI.
-		area := clip.Rect{Max: gtx.Constraints.Max}.Push(gtx.Ops)
-		key.InputOp{
-			Tag:  w.w,
-			Keys: w.keys,
-		}.Add(gtx.Ops)
-
-		for _, e := range gtx.Events(w.w) {
-			switch e := e.(type) {
-			case key.Event:
-				switch e.Name {
-				case "Q", key.NameEscape:
-					return winStop
-				}
-			}
-		}
-		area.Pop()
-
-		cnv := vggio.New(
-			gtx,
-			xmax, ymax,
-			vggio.UseDPI(dpi),
-		)
-		w.mu.Lock()
-		w.plt.Draw(draw.New(cnv))
-		w.mu.Unlock()
-		e.Frame(cnv.Paint())
-	}
-	return winContinue
-}
diff --git a/pawgo/wmgr_test.go b/pawgo/wmgr_test.go
deleted file mode 100644
index 81d5172b3..000000000
--- a/pawgo/wmgr_test.go
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright ©2020 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
-	"testing"
-
-	"gioui.org/io/key"
-	"gioui.org/io/router"
-	"gioui.org/io/system"
-	"gioui.org/op"
-	"go-hep.org/x/hep/hplot"
-)
-
-func TestPlot(t *testing.T) {
-	wmgr := newWinMgr(nil)
-	defer wmgr.Close()
-
-	p := hplot.New()
-	p.Title.Text = "my plot"
-	p.X.Label.Text = "x"
-	p.Y.Label.Text = "y"
-
-	win := wmgr.newPlot(p)
-	<-win.ready
-
-	rc := win.handle(system.FrameEvent{
-		Frame: func(frame *op.Ops) {},
-		Queue: new(router.Router),
-	})
-	if got, want := rc, winContinue; got != want {
-		t.Fatalf("invalid window state: got=%v, want=%v", got, want)
-	}
-
-	rc = win.handle(key.Event{Name: "Q"})
-	if got, want := rc, winContinue; got != want {
-		t.Fatalf("invalid window state: got=%v, want=%v", got, want)
-	}
-
-	rc = win.handle(system.DestroyEvent{Err: nil})
-	if got, want := rc, winStop; got != want {
-		t.Fatalf("invalid window state: got=%v, want=%v", got, want)
-	}
-
-	err := wmgr.Close()
-	if err != nil {
-		t.Fatalf("could not close wmgr: %+v", err)
-	}
-
-	wmgr.wg.Wait()
-}
diff --git a/pawgo/wmgr_xcomp.go b/pawgo/wmgr_xcomp.go
deleted file mode 100644
index 6d7b2a50a..000000000
--- a/pawgo/wmgr_xcomp.go
+++ /dev/null
@@ -1,34 +0,0 @@
-// Copyright ©2020 The go-hep Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build cross_compile
-
-package main
-
-import (
-	"log"
-
-	"go-hep.org/x/hep/hplot"
-)
-
-type winMgr struct {
-	msg *log.Logger
-}
-
-func newWinMgr(msg *log.Logger) *winMgr {
-	return &winMgr{
-		msg: msg,
-	}
-}
-
-func (wmgr *winMgr) newPlot(p *hplot.Plot) *window {
-	return nil
-}
-
-func (wmgr *winMgr) Close() error {
-	return nil
-}
-
-type window struct {
-}