Hi,
May be this helps:
A$Variable <- rep(colnames(A[,-1]),nrow(A))[t(!!A[,-1])]
A.K.
On Thursday, February 20, 2014 5:55 PM, ioanna ioannou <ii54250 at
msn.com> wrote:
Hello,
Assuming that I have a data frame
A<-data.frame(A=c(10,100,1000,30,50,60,300),
? ? ? ? ? ? ? B=c(0,1,1,1,0,0,0),? ? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? C=c(0,0,0,0,1,1,0),
? ? ? ? ? ? ? D=c(1,0,0,0,0,0,1))
What I would like is to introduce a new column Variable such that:
A<-data.frame(A=c(10,100,1000,30,50,60,300),
? ? ? ? ? ? ? B=c(0,1,1,1,0,0,0),? ? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? C=c(0,0,0,0,1,1,0),
? ? ? ? ? ? ? D=c(1,0,0,0,0,0,1),
? ? ? Variable=c(D,B,B,B,C,C,D))
How can I do it?
Best
IOanna
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