Note, the R-intro.R is correct.
svn diff R-intro.texi
Index: R-intro.texi
===================================================================
--- R-intro.texi (revision 71664)
+++ R-intro.texi (working copy)
@@ -1525,7 +1525,7 @@
After this assignment, the standard errors are calculated by
@example
-> incster <- tapply(incomes, statef, stderr)
+> incster <- tapply(incomes, statef, stdError)
@end example
@noindent
Evelyn Mitchell