/
grid-Ex.Rout.save
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grid-Ex.Rout.save
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R Under development (unstable) (2012-09-30 r60839) -- "Unsuffered Consequences"
Copyright (C) 2012 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i686-pc-linux-gnu (32-bit)
R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.
Natural language support but running in an English locale
R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.
Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.
> pkgname <- "grid"
> source(file.path(R.home("share"), "R", "examples-header.R"))
> options(warn = 1)
> library('grid')
>
> assign(".oldSearch", search(), pos = 'CheckExEnv')
> cleanEx()
> nameEx("Grid")
> ### * Grid
>
> flush(stderr()); flush(stdout())
>
> ### Name: Grid
> ### Title: Grid Graphics
> ### Aliases: Grid
> ### Keywords: dplot
>
> ### ** Examples
>
> ## Diagram of a simple layout
> grid.show.layout(grid.layout(4,2,
+ heights=unit(rep(1, 4),
+ c("lines", "lines", "lines", "null")),
+ widths=unit(c(1, 1), "inches")))
> ## Diagram of a sample viewport
> grid.show.viewport(viewport(x=0.6, y=0.6,
+ w=unit(1, "inches"), h=unit(1, "inches")))
> ## A flash plotting example
> grid.multipanel(vp=viewport(0.5, 0.5, 0.8, 0.8))
>
>
>
> cleanEx()
> nameEx("arrow")
> ### * arrow
>
> flush(stderr()); flush(stdout())
>
> ### Name: arrow
> ### Title: Describe arrows to add to a line.
> ### Aliases: arrow
> ### Keywords: dplot
>
> ### ** Examples
>
> arrow()
$angle
[1] 30
$length
[1] 0.25inches
$ends
[1] 2
$type
[1] 1
attr(,"class")
[1] "arrow"
>
>
>
> cleanEx()
> nameEx("calcStringMetric")
> ### * calcStringMetric
>
> flush(stderr()); flush(stdout())
>
> ### Name: calcStringMetric
> ### Title: Calculate Metric Information for Text
> ### Aliases: calcStringMetric
> ### Keywords: dplot
>
> ### ** Examples
>
> grid.newpage()
> grid.segments(.01, .5, .99, .5, gp=gpar(col="grey"))
> metrics <- calcStringMetric(letters)
> grid.rect(x=1:26/27,
+ width=unit(metrics$width, "inches"),
+ height=unit(metrics$ascent, "inches"),
+ just="bottom",
+ gp=gpar(col="red"))
> grid.rect(x=1:26/27,
+ width=unit(metrics$width, "inches"),
+ height=unit(metrics$descent, "inches"),
+ just="top",
+ gp=gpar(col="red"))
> grid.text(letters, x=1:26/27, just="bottom")
>
> test <- function(x) {
+ grid.text(x, just="bottom")
+ metric <- calcStringMetric(x)
+ if (is.character(x)) {
+ grid.rect(width=unit(metric$width, "inches"),
+ height=unit(metric$ascent, "inches"),
+ just="bottom",
+ gp=gpar(col=rgb(1,0,0,.5)))
+ grid.rect(width=unit(metric$width, "inches"),
+ height=unit(metric$descent, "inches"),
+ just="top",
+ gp=gpar(col=rgb(1,0,0,.5)))
+ } else {
+ grid.rect(width=unit(metric$width, "inches"),
+ y=unit(.5, "npc") + unit(metric[2], "inches"),
+ height=unit(metric$ascent, "inches"),
+ just="bottom",
+ gp=gpar(col=rgb(1,0,0,.5)))
+ grid.rect(width=unit(metric$width, "inches"),
+ height=unit(metric$descent, "inches"),
+ just="bottom",
+ gp=gpar(col=rgb(1,0,0,.5)))
+ }
+ }
>
> tests <- list("t",
+ "test",
+ "testy",
+ "test\ntwo",
+ expression(x),
+ expression(y),
+ expression(x + y),
+ expression(a + b),
+ expression(atop(x + y, 2)))
>
> grid.newpage()
> nrowcol <- n2mfrow(length(tests))
> pushViewport(viewport(layout=grid.layout(nrowcol[1], nrowcol[2]),
+ gp=gpar(cex=5, lwd=.5)))
> for (i in 1:length(tests)) {
+ col <- (i - 1) %% nrowcol[2] + 1
+ row <- (i - 1) %/% nrowcol[2] + 1
+ pushViewport(viewport(layout.pos.row=row, layout.pos.col=col))
+ test(tests[[i]])
+ popViewport()
+ }
>
>
>
>
> cleanEx()
> nameEx("convertNative")
> ### * convertNative
>
> flush(stderr()); flush(stdout())
>
> ### Name: convertNative
> ### Title: Convert a Unit Object to Native units
> ### Aliases: convertNative
> ### Keywords: dplot
>
> ### ** Examples
>
> grid.newpage()
> pushViewport(viewport(width=unit(.5, "npc"),
+ height=unit(.5, "npc")))
> grid.rect()
> w <- convertNative(unit(1, "inches"))
Warning: 'convertNative' is deprecated.
Use 'convertUnit' instead.
See help("Deprecated")
> h <- convertNative(unit(1, "inches"), "y")
Warning: 'convertNative' is deprecated.
Use 'convertUnit' instead.
See help("Deprecated")
> # This rectangle starts off life as 1in square, but if you
> # resize the device it will no longer be 1in square
> grid.rect(width=unit(w, "native"), height=unit(h, "native"),
+ gp=gpar(col="red"))
> popViewport(1)
>
> # How to use grid.convert(), etc instead
> convertNative(unit(1, "inches")) ==
+ convertX(unit(1, "inches"), "native", valueOnly=TRUE)
Warning: 'convertNative' is deprecated.
Use 'convertUnit' instead.
See help("Deprecated")
[1] TRUE
> convertNative(unit(1, "inches"), "y", "dimension") ==
+ convertHeight(unit(1, "inches"), "native", valueOnly=TRUE)
Warning: 'convertNative' is deprecated.
Use 'convertUnit' instead.
See help("Deprecated")
[1] TRUE
>
>
>
> cleanEx()
> nameEx("current.viewport")
> ### * current.viewport
>
> flush(stderr()); flush(stdout())
>
> ### Name: Querying the Viewport Tree
> ### Title: Get the Current Grid Viewport (Tree)
> ### Aliases: current.viewport current.vpTree current.vpPath
> ### current.transform
> ### Keywords: dplot
>
> ### ** Examples
>
> grid.newpage()
> pushViewport(viewport(width=0.8, height=0.8, name="A"))
> pushViewport(viewport(x=0.1, width=0.3, height=0.6,
+ just="left", name="B"))
> upViewport(1)
> pushViewport(viewport(x=0.5, width=0.4, height=0.8,
+ just="left", name="C"))
> pushViewport(viewport(width=0.8, height=0.8, name="D"))
> current.vpPath()
GRID.VP.67::A::C::D
> upViewport(1)
> current.vpPath()
GRID.VP.67::A::C
> current.vpTree()
viewport[ROOT]->(viewport[GRID.VP.67]->(viewport[A]->(viewport[B], viewport[C]->(viewport[D]))))
> current.viewport()
viewport[C]
> current.vpTree(all=FALSE)
viewport[C]->(viewport[D])
> popViewport(0)
>
>
>
> cleanEx()
> nameEx("gEdit")
> ### * gEdit
>
> flush(stderr()); flush(stdout())
>
> ### Name: gEdit
> ### Title: Create and Apply Edit Objects
> ### Aliases: gEdit gEditList applyEdit applyEdits
> ### Keywords: dplot
>
> ### ** Examples
>
> grid.rect(gp=gpar(col="red"))
> # same thing, but more verbose
> grid.draw(applyEdit(rectGrob(), gEdit(gp=gpar(col="red"))))
>
>
>
> cleanEx()
> nameEx("gPath")
> ### * gPath
>
> flush(stderr()); flush(stdout())
>
> ### Name: gPath
> ### Title: Concatenate Grob Names
> ### Aliases: gPath
> ### Keywords: dplot
>
> ### ** Examples
>
> gPath("g1", "g2")
g1::g2
>
>
>
> cleanEx()
> nameEx("getNames")
> ### * getNames
>
> flush(stderr()); flush(stdout())
>
> ### Name: getNames
> ### Title: List the names of grobs on the display list
> ### Aliases: getNames
> ### Keywords: dplot
>
> ### ** Examples
>
> grid.grill()
> getNames()
[1] "GRID.text.168" "GRID.rect.169" "GRID.rect.170"
[4] "GRID.segments.171" "GRID.segments.172"
>
>
>
> cleanEx()
> nameEx("gpar")
> ### * gpar
>
> flush(stderr()); flush(stdout())
>
> ### Name: gpar
> ### Title: Handling Grid Graphical Parameters
> ### Aliases: gpar get.gpar
> ### Keywords: dplot
>
> ### ** Examples
>
> gp <- get.gpar()
> utils::str(gp)
List of 14
$ fill : chr "transparent"
$ col : chr "black"
$ lty : chr "solid"
$ lwd : num 1
$ cex : num 1
$ fontsize : num 12
$ lineheight: num 1.2
$ font : int 1
$ fontfamily: chr ""
$ alpha : num 1
$ lineend : chr "round"
$ linejoin : chr "round"
$ linemitre : num 10
$ lex : num 1
- attr(*, "class")= chr "gpar"
> ## These *do* nothing but produce a "gpar" object:
> gpar(col = "red")
$col
[1] "red"
> gpar(col = "blue", lty = "solid", lwd = 3, fontsize = 16)
$col
[1] "blue"
$lty
[1] "solid"
$lwd
[1] 3
$fontsize
[1] 16
> get.gpar(c("col", "lty"))
$col
[1] "black"
$lty
[1] "solid"
> grid.newpage()
> vp <- viewport(w = .8, h = .8, gp = gpar(col="blue"))
> grid.draw(gTree(children=gList(rectGrob(gp = gpar(col="red")),
+ textGrob(paste("The rect is its own colour (red)",
+ "but this text is the colour",
+ "set by the gTree (green)",
+ sep = "\n"))),
+ gp = gpar(col="green"), vp = vp))
> grid.text("This text is the colour set by the viewport (blue)",
+ y = 1, just = c("center", "bottom"),
+ gp = gpar(fontsize=20), vp = vp)
> grid.newpage()
> ## example with multiple values for a parameter
> pushViewport(viewport())
> grid.points(1:10/11, 1:10/11, gp = gpar(col=1:10))
> popViewport()
>
>
>
> cleanEx()
> nameEx("grid.DLapply")
> ### * grid.DLapply
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.DLapply
> ### Title: Modify the Grid Display List
> ### Aliases: grid.DLapply
> ### Keywords: dplot
>
> ### ** Examples
>
> grid.newpage()
> grid.rect(width=.5, height=.5, gp=gpar(fill="grey"))
> grid.DLapply(function(x) { if (is.grob(x)) x$gp <- gpar(); x })
NULL
> grid.refresh()
>
>
>
> cleanEx()
> nameEx("grid.arrows")
> ### * grid.arrows
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.arrows
> ### Title: Draw Arrows
> ### Aliases: grid.arrows arrowsGrob
> ### Keywords: dplot
>
> ### ** Examples
>
> ## Not run:
> ##D ## to avoid lots of deprecation warnings
> ##D pushViewport(viewport(layout=grid.layout(2, 4)))
> ##D pushViewport(viewport(layout.pos.col=1,
> ##D layout.pos.row=1))
> ##D grid.rect(gp=gpar(col="grey"))
> ##D grid.arrows()
> ##D popViewport()
> ##D pushViewport(viewport(layout.pos.col=2,
> ##D layout.pos.row=1))
> ##D grid.rect(gp=gpar(col="grey"))
> ##D grid.arrows(angle=15, type="closed")
> ##D popViewport()
> ##D pushViewport(viewport(layout.pos.col=3,
> ##D layout.pos.row=1))
> ##D grid.rect(gp=gpar(col="grey"))
> ##D grid.arrows(angle=5, length=unit(0.1, "npc"),
> ##D type="closed", gp=gpar(fill="white"))
> ##D popViewport()
> ##D pushViewport(viewport(layout.pos.col=4,
> ##D layout.pos.row=1))
> ##D grid.rect(gp=gpar(col="grey"))
> ##D grid.arrows(x=unit(0:80/100, "npc"),
> ##D y=unit(1 - (0:80/100)^2, "npc"))
> ##D popViewport()
> ##D pushViewport(viewport(layout.pos.col=1,
> ##D layout.pos.row=2))
> ##D grid.rect(gp=gpar(col="grey"))
> ##D grid.arrows(ends="both")
> ##D popViewport()
> ##D pushViewport(viewport(layout.pos.col=2,
> ##D layout.pos.row=2))
> ##D grid.rect(gp=gpar(col="grey"))
> ##D # Recycling arguments
> ##D grid.arrows(x=unit(1:10/11, "npc"), y=unit(1:3/4, "npc"))
> ##D popViewport()
> ##D pushViewport(viewport(layout.pos.col=3,
> ##D layout.pos.row=2))
> ##D grid.rect(gp=gpar(col="grey"))
> ##D # Drawing arrows on a segments grob
> ##D gs <- segmentsGrob(x0=unit(1:4/5, "npc"),
> ##D x1=unit(1:4/5, "npc"))
> ##D grid.arrows(grob=gs, length=unit(0.1, "npc"),
> ##D type="closed", gp=gpar(fill="white"))
> ##D popViewport()
> ##D pushViewport(viewport(layout.pos.col=4,
> ##D layout.pos.row=2))
> ##D grid.rect(gp=gpar(col="grey"))
> ##D # Arrows on a lines grob
> ##D # Name these because going to grid.edit them later
> ##D gl <- linesGrob(name="curve", x=unit(0:80/100, "npc"),
> ##D y=unit((0:80/100)^2, "npc"))
> ##D grid.arrows(name="arrowOnLine", grob=gl, angle=15, type="closed",
> ##D gp=gpar(fill="black"))
> ##D popViewport()
> ##D pushViewport(viewport(layout.pos.col=1,
> ##D layout.pos.row=2))
> ##D grid.move.to(x=0.5, y=0.8)
> ##D popViewport()
> ##D pushViewport(viewport(layout.pos.col=4,
> ##D layout.pos.row=1))
> ##D # Arrows on a line.to grob
> ##D glt <- lineToGrob(x=0.5, y=0.2, gp=gpar(lwd=3))
> ##D grid.arrows(grob=glt, ends="first", gp=gpar(lwd=3))
> ##D popViewport(2)
> ##D grid.edit(gPath("arrowOnLine", "curve"), y=unit((0:80/100)^3, "npc"))
> ## End(Not run)
>
>
>
> cleanEx()
> nameEx("grid.bezier")
> ### * grid.bezier
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.bezier
> ### Title: Draw a Bezier Curve
> ### Aliases: grid.bezier bezierGrob
> ### Keywords: dplot
>
> ### ** Examples
>
> x <- c(0.2, 0.2, 0.4, 0.4)
> y <- c(0.2, 0.4, 0.4, 0.2)
>
> grid.newpage()
> grid.bezier(x, y)
> grid.bezier(c(x, x + .4), c(y + .4, y + .4),
+ id=rep(1:2, each=4))
> grid.segments(.4, .6, .6, .6)
> grid.bezier(x, y,
+ gp=gpar(lwd=3, fill="black"),
+ arrow=arrow(type="closed"),
+ vp=viewport(x=.9))
>
>
>
> cleanEx()
> nameEx("grid.cap")
> ### * grid.cap
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.cap
> ### Title: Capture a raster image
> ### Aliases: grid.cap
> ### Keywords: dplot
>
> ### ** Examples
>
> ## Not run:
> ##D dev.new(width=.5, height=.5)
> ##D grid.rect()
> ##D grid.text("hi")
> ##D cap <- grid.cap()
> ##D dev.off()
> ##D
> ##D grid.raster(cap, width=.5, height=.5, interpolate=FALSE)
> ## End(Not run)
>
>
>
> cleanEx()
> nameEx("grid.clip")
> ### * grid.clip
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.clip
> ### Title: Set the Clipping Region
> ### Aliases: grid.clip clipGrob
> ### Keywords: dplot
>
> ### ** Examples
>
> # draw across entire viewport, but clipped
> grid.clip(x = 0.3, width = 0.1)
> grid.lines(gp=gpar(col="green", lwd=5))
> # draw across entire viewport, but clipped (in different place)
> grid.clip(x = 0.7, width = 0.1)
> grid.lines(gp=gpar(col="red", lwd=5))
> # Viewport sets new clip region
> pushViewport(viewport(width=0.5, height=0.5, clip=TRUE))
> grid.lines(gp=gpar(col="grey", lwd=3))
> # Return to original viewport; get
> # clip region from previous grid.clip()
> # (NOT from previous viewport clip region)
> popViewport()
> grid.lines(gp=gpar(col="black"))
>
>
>
> cleanEx()
> nameEx("grid.convert")
> ### * grid.convert
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.convert
> ### Title: Convert Between Different grid Coordinate Systems
> ### Aliases: grid.convert grid.convertX grid.convertY grid.convertWidth
> ### grid.convertHeight convertUnit convertX convertY convertWidth
> ### convertHeight
> ### Keywords: dplot
>
> ### ** Examples
>
> ## A tautology
> convertX(unit(1, "inches"), "inches")
[1] 1inches
> ## The physical units
> convertX(unit(2.54, "cm"), "inches")
[1] 1inches
> convertX(unit(25.4, "mm"), "inches")
[1] 1inches
> convertX(unit(72.27, "points"), "inches")
[1] 1inches
> convertX(unit(1/12*72.27, "picas"), "inches")
[1] 1inches
> convertX(unit(72, "bigpts"), "inches")
[1] 1inches
> convertX(unit(1157/1238*72.27, "dida"), "inches")
[1] 1inches
> convertX(unit(1/12*1157/1238*72.27, "cicero"), "inches")
[1] 1inches
> convertX(unit(65536*72.27, "scaledpts"), "inches")
[1] 1inches
> convertX(unit(1/2.54, "inches"), "cm")
[1] 1cm
> convertX(unit(1/25.4, "inches"), "mm")
[1] 1mm
> convertX(unit(1/72.27, "inches"), "points")
[1] 1points
> convertX(unit(1/(1/12*72.27), "inches"), "picas")
[1] 1picas
> convertX(unit(1/72, "inches"), "bigpts")
[1] 1bigpts
> convertX(unit(1/(1157/1238*72.27), "inches"), "dida")
[1] 1dida
> convertX(unit(1/(1/12*1157/1238*72.27), "inches"), "cicero")
[1] 1cicero
> convertX(unit(1/(65536*72.27), "inches"), "scaledpts")
[1] 1scaledpts
>
> pushViewport(viewport(width=unit(1, "inches"),
+ height=unit(2, "inches"),
+ xscale=c(0, 1),
+ yscale=c(1, 3)))
> ## Location versus dimension
> convertY(unit(2, "native"), "inches")
[1] 1inches
> convertHeight(unit(2, "native"), "inches")
[1] 2inches
> ## From "x" to "y" (the conversion is via "inches")
> convertUnit(unit(1, "native"), "native",
+ axisFrom="x", axisTo="y")
[1] 2native
> ## Convert several values at once
> convertX(unit(c(0.5, 2.54), c("npc", "cm")),
+ c("inches", "native"))
[1] 0.5inches 1native
> popViewport()
> ## Convert a complex unit
> convertX(unit(1, "strwidth", "Hello"), "native")
[1] 0.0558333333333333native
>
>
>
> cleanEx()
> nameEx("grid.curve")
> ### * grid.curve
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.curve
> ### Title: Draw a Curve Between Locations
> ### Aliases: grid.curve curveGrob arcCurvature
> ### Keywords: dplot
>
> ### ** Examples
>
> curveTest <- function(i, j, ...) {
+ pushViewport(viewport(layout.pos.col=j, layout.pos.row=i))
+ do.call("grid.curve", c(list(x1=.25, y1=.25, x2=.75, y2=.75), list(...)))
+ grid.text(sub("list\\((.*)\\)", "\\1",
+ deparse(substitute(list(...)))),
+ y=unit(1, "npc"))
+ popViewport()
+ }
> # grid.newpage()
> pushViewport(plotViewport(c(0, 0, 1, 0),
+ layout=grid.layout(2, 1, heights=c(2, 1))))
> pushViewport(viewport(layout.pos.row=1,
+ layout=grid.layout(3, 3, respect=TRUE)))
> curveTest(1, 1)
> curveTest(1, 2, inflect=TRUE)
> curveTest(1, 3, angle=135)
> curveTest(2, 1, arrow=arrow())
> curveTest(2, 2, ncp=8)
> curveTest(2, 3, shape=0)
> curveTest(3, 1, curvature=-1)
> curveTest(3, 2, square=FALSE)
> curveTest(3, 3, debug=TRUE)
> popViewport()
> pushViewport(viewport(layout.pos.row=2,
+ layout=grid.layout(3, 3)))
> curveTest(1, 1)
> curveTest(1, 2, inflect=TRUE)
> curveTest(1, 3, angle=135)
> curveTest(2, 1, arrow=arrow())
> curveTest(2, 2, ncp=8)
> curveTest(2, 3, shape=0)
> curveTest(3, 1, curvature=-1)
> curveTest(3, 2, square=FALSE)
> curveTest(3, 3, debug=TRUE)
> popViewport(2)
>
>
>
> cleanEx()
> nameEx("grid.draw")
> ### * grid.draw
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.draw
> ### Title: Draw a grid grob
> ### Aliases: grid.draw
> ### Keywords: dplot
>
> ### ** Examples
>
> grid.newpage()
> ## Create a graphical object, but don't draw it
> l <- linesGrob()
> ## Draw it
> grid.draw(l)
>
>
>
> cleanEx()
> nameEx("grid.edit")
> ### * grid.edit
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.edit
> ### Title: Edit the Description of a Grid Graphical Object
> ### Aliases: grid.edit grid.gedit editGrob
> ### Keywords: dplot
>
> ### ** Examples
>
> grid.newpage()
> grid.xaxis(name = "xa", vp = viewport(width=.5, height=.5))
> grid.edit("xa", gp = gpar(col="red"))
> # won't work because no ticks (at is NULL)
> try(grid.edit(gPath("xa", "ticks"), gp = gpar(col="green")))
Error in editDLfromGPath(gPath, specs, strict, grep, global, redraw) :
'gPath' (xa::ticks) not found
> grid.edit("xa", at = 1:4/5)
> # Now it should work
> try(grid.edit(gPath("xa", "ticks"), gp = gpar(col="green")))
>
>
>
> cleanEx()
> nameEx("grid.frame")
> ### * grid.frame
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.frame
> ### Title: Create a Frame for Packing Objects
> ### Aliases: grid.frame frameGrob
> ### Keywords: dplot
>
> ### ** Examples
>
> grid.newpage()
> grid.frame(name="gf", draw=TRUE)
> grid.pack("gf", rectGrob(gp=gpar(fill="grey")), width=unit(1, "null"))
> grid.pack("gf", textGrob("hi there"), side="right")
>
>
>
> cleanEx()
> nameEx("grid.function")
> ### * grid.function
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.function
> ### Title: Draw a curve representing a function
> ### Aliases: grid.function functionGrob grid.abline
> ### Keywords: dplot
>
> ### ** Examples
>
> # abline
> # NOTE: in ROOT viewport on screen, (0, 0) at top-left
> # and "native" is pixels!
> grid.function(function(x) list(x=x, y=0 + 1*x))
> # a more "normal" viewport with default normalized "native" coords
> grid.newpage()
> pushViewport(viewport())
> grid.function(function(x) list(x=x, y=0 + 1*x))
> # slightly simpler
> grid.newpage()
> pushViewport(viewport())
> grid.abline()
> # sine curve
> grid.newpage()
> pushViewport(viewport(xscale=c(0, 2*pi), yscale=c(-1, 1)))
> grid.function(function(x) list(x=x, y=sin(x)))
> # constrained sine curve
> grid.newpage()
> pushViewport(viewport(xscale=c(0, 2*pi), yscale=c(-1, 1)))
> grid.function(function(x) list(x=x, y=sin(x)),
+ range=0:1)
> # inverse sine curve
> grid.newpage()
> pushViewport(viewport(xscale=c(-1, 1), yscale=c(0, 2*pi)))
> grid.function(function(y) list(x=sin(y), y=y),
+ range="y")
> # parametric function
> grid.newpage()
> pushViewport(viewport(xscale=c(-1, 1), yscale=c(-1, 1)))
> grid.function(function(t) list(x=cos(t), y=sin(t)),
+ range=c(0, 9*pi/5))
> # physical abline
> grid.newpage()
> grid.function(function(x) list(x=x, y=0 + 1*x),
+ units="in")
>
>
>
> cleanEx()
> nameEx("grid.get")
> ### * grid.get
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.get
> ### Title: Get a Grid Graphical Object
> ### Aliases: grid.get grid.gget getGrob
> ### Keywords: dplot
>
> ### ** Examples
>
> grid.xaxis(name="xa")
> grid.get("xa")
xaxis[xa]
> grid.get(gPath("xa", "ticks"))
NULL
>
> grid.draw(gTree(name="gt", children=gList(xaxisGrob(name="axis"))))
> grid.get(gPath("gt", "axis", "ticks"))
NULL
>
>
>
> cleanEx()
> nameEx("grid.grab")
> ### * grid.grab
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.grab
> ### Title: Grab the current grid output
> ### Aliases: grid.grab grid.grabExpr
> ### Keywords: dplot
>
> ### ** Examples
>
> pushViewport(viewport(w=.5, h=.5))
> grid.rect()
> grid.points(stats::runif(10), stats::runif(10))
> popViewport()
> grab <- grid.grab()
> grid.newpage()
> grid.draw(grab)
>
>
>
> cleanEx()
> nameEx("grid.layout")
> ### * grid.layout
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.layout
> ### Title: Create a Grid Layout
> ### Aliases: grid.layout
> ### Keywords: dplot
>
> ### ** Examples
>
> ## A variety of layouts (some a bit mid-bending ...)
> layout.torture()
> ## Demonstration of layout justification
> grid.newpage()
> testlay <- function(just="centre") {
+ pushViewport(viewport(layout=grid.layout(1, 1, widths=unit(1, "inches"),
+ heights=unit(0.25, "npc"),
+ just=just)))
+ pushViewport(viewport(layout.pos.col=1, layout.pos.row=1))
+ grid.rect()
+ grid.text(paste(just, collapse="-"))
+ popViewport(2)
+ }
> testlay()
> testlay(c("left", "top"))
> testlay(c("right", "top"))
> testlay(c("right", "bottom"))
> testlay(c("left", "bottom"))
> testlay(c("left"))
> testlay(c("right"))
> testlay(c("bottom"))
> testlay(c("top"))
>
>
>
> cleanEx()
> nameEx("grid.lines")
> ### * grid.lines
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.lines
> ### Title: Draw Lines in a Grid Viewport
> ### Aliases: grid.lines linesGrob grid.polyline polylineGrob
> ### Keywords: dplot
>
> ### ** Examples
>
> grid.lines()
> # Using id (NOTE: locations are not in consecutive blocks)
> grid.newpage()
> grid.polyline(x=c((0:4)/10, rep(.5, 5), (10:6)/10, rep(.5, 5)),
+ y=c(rep(.5, 5), (10:6/10), rep(.5, 5), (0:4)/10),
+ id=rep(1:5, 4),
+ gp=gpar(col=1:5, lwd=3))
> # Using id.lengths
> grid.newpage()
> grid.polyline(x=outer(c(0, .5, 1, .5), 5:1/5),
+ y=outer(c(.5, 1, .5, 0), 5:1/5),
+ id.lengths=rep(4, 5),
+ gp=gpar(col=1:5, lwd=3))
>
>
>
> cleanEx()
> nameEx("grid.locator")
> ### * grid.locator
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.locator
> ### Title: Capture a Mouse Click
> ### Aliases: grid.locator
> ### Keywords: dplot
>
> ### ** Examples
>
> if (interactive()) {
+ ## Need to write a more sophisticated unit as.character method
+ unittrim <- function(unit) {
+ sub("^([0-9]+|[0-9]+[.][0-9])[0-9]*", "\\1", as.character(unit))
+ }
+ do.click <- function(unit) {
+ click.locn <- grid.locator(unit)
+ grid.segments(unit.c(click.locn$x, unit(0, "npc")),
+ unit.c(unit(0, "npc"), click.locn$y),
+ click.locn$x, click.locn$y,
+ gp=gpar(lty="dashed", col="grey"))
+ grid.points(click.locn$x, click.locn$y, pch=16, size=unit(1, "mm"))
+ clickx <- unittrim(click.locn$x)
+ clicky <- unittrim(click.locn$y)
+ grid.text(paste("(", clickx, ", ", clicky, ")", sep=""),
+ click.locn$x + unit(2, "mm"), click.locn$y,
+ just="left")
+ }
+ do.click("inches")
+ pushViewport(viewport(width=0.5, height=0.5,
+ xscale=c(0, 100), yscale=c(0, 10)))
+ grid.rect()
+ grid.xaxis()
+ grid.yaxis()
+ do.click("native")
+ popViewport()
+ }
>
>
>
> cleanEx()
> nameEx("grid.ls")
> ### * grid.ls
>
> flush(stderr()); flush(stdout())
>
> ### Name: grid.ls
> ### Title: List the names of grobs or viewports
> ### Aliases: grid.ls nestedListing pathListing grobPathListing
> ### Keywords: dplot
>
> ### ** Examples
>
> # A gTree, called "parent", with childrenvp vpTree (vp2 within vp1)
> # and child grob, called "child", with vp vpPath (down to vp2)
> sampleGTree <- gTree(name="parent",
+ children=gList(grob(name="child", vp="vp1::vp2")),
+ childrenvp=vpTree(parent=viewport(name="vp1"),
+ children=vpList(viewport(name="vp2"))))
> grid.ls(sampleGTree)
parent
child
> # Show viewports too
> grid.ls(sampleGTree, view=TRUE)
parent
vp1
vp2
2
vp1
vp2
child
2
> # Only show viewports