[R] evaluating and walking in names

[Cezar Augusto de Freitas Anselmo]

Hi, all.
Suppose I have an object with names (like a data.frame) and I want to walk
in a loop with your names. How can I do this? The idea is like this:

my.data<-data.frame(matrix(runif(6),ncol=2))
names(my.data)
[1] "X1" "X2"

for(i in names(my.data)){
	my.variable <- cat(paste("my.data$", i, "\n", sep=""))
	print(mean(my.variable))
}

#it doesn't work.

Thnaks for all,
C.

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Cezar Freitas (ICQ 109128967)
IMECC - UNICAMP
Campinas, SP - Brasil