Linlin Yan wrote:
Try this:
x[, colnames(x) != 'a']
And more general:
x[, !colnames(x) %in% c('a','b')]
Paul
[1] 3 4
On Tue, Nov 3, 2009 at 9:31 AM, Peng Yu <pengyu...@gmail.com> wrote:
I can exclude columns by column number using '-'. But I wondering if
there is an easy way to exclude some columns by column names.
x=cbind(c(1,2),c(3,4))
x
[,1] [,2]
[1,] 1 3
[2,] 2 4
colnames(x)=c('a','b')
x
a b
[1,] 1 3
[2,] 2 4
x[,-'a']
Error in -"a" : invalid argument to unary operator
x[,-1]
[1] 3 4
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Drs. Paul Hiemstra
Department of Physical Geography
Faculty of Geosciences
University of Utrecht
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