[R] Prefix for colnames
p.dalgaard at biostat.ku.dk
Wed Jul 20 16:10:40 CEST 2005
jhainm at fas.harvard.edu writes:
> I would like to add a prefix to colnames in a matrix but I can't get the prefix
> option in colnames to work. What am I doing wrong?
> > X<-matrix(NA,3,4)
> > colnames(X)<-c("test","test","test","test")
> > colnames(X)<-colnames(X,prefix="PREFIX.")
> > X
> test test test test
> [1,] NA NA NA NA
> [2,] NA NA NA NA
> [3,] NA NA NA NA
> ?? I also tried with do.NULL set to FALSE but it still does not work.
> Thank you very much for your help!
function (x, do.NULL = TRUE, prefix = "col")
dn <- dimnames(x)
else paste(prefix, seq(length = NCOL(x)), sep = "")
So if x has colnames that's what you get, irrespective of "prefix".
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