diff --git a/.gitignore b/.gitignore
index adb0277f..4fee7069 100644
--- a/.gitignore
+++ b/.gitignore
@@ -249,3 +249,11 @@ _region_.*
 
 # Gummi
 *.swp
+.Rproj.user
+*.Rproj
+
+# Generated tex by Sweave
+exercises/*.tex
+
+# sandbox
+sandbox/*