Hi all,
I am try to do a loop on a data .such as:
X<-data.frame(name=c(1:9),SN=c(1,1,1,2,2,2,3,3,3),EW=rep(1:3,3))
X
name SN EW
1 1 1 1
2 2 1 2
3 3 1 3
4 4 2 1
5 5 2 2
6 6 2 3
7 7 3 1
8 8 3 2
9 9 3 3
out<-list()
for ( i in 1:3) {out[[i]]<-subset( X,X$SN==1&EW==i) } ##this expression
can have the subset of EW=1 (and EW=2 EW=3) when SN=1
out
[[1]]
name SN EW
1 1 1 1
[[2]]
name SN EW
2 2 1 2
[[3]]
name SN EW
3 3 1 3
Question: What can I do if I want to have the all subset at once when
SN=1:3 ? How to write the loop?
thank you very much!
----hanwenheng
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