Hi all,
My problem may be related with the list manipulations. See below.
#example data
a<-list()
a[[1]]<-data.frame(matrix(c(1:4),ncol=2));
a[[2]]<-data.frame(matrix(c(5:8),ncol=2))
I can use a[[1]]$X1,a[[1]]$X2,a[[2]]$X1,a[[2]]$X2 to use the corresponding
variables. But what i need to do is to use function parameters to specify
the variable names. The variable names will be different for various
dataset, so i need a common place to indicate it.
Something like,
b<-function(var1=X1,var2=X2) {
for (n in 1:2) {
paste("a", "[[",n, "]]","$","var1", sep="")
paste("a", "[[",n, "]]","$","var2", sep="")
}
}
b(var1=X1,var2=X2) will have the same effect
as a[[1]]$X1,a[[1]]$X2,a[[2]]$X1,a[[2]]$X2. Unfortunately, it does not
work.
Anybody can give me some suggestions on this? Hope it is clear for this
question.
Thanks a lot.
P.S.
> a
[[1]]
X1 X2
1 1 3
2 2 4
[[2]]
X1 X2
1 5 7
2 6 8
-----------------
Jane Chang
Queen's
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