Try this;
x[,setdiff(colnames(x), 'a')]
On Mon, Nov 2, 2009 at 11:31 PM, Peng Yu 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,]
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 wrote:
I can exclude columns by column number using '-'. But I wondering if
there is an easy way to exclude some columns
Try this:
> x[, colnames(x) != 'a']
[1] 3 4
On Tue, Nov 3, 2009 at 9:31 AM, Peng Yu 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,
Hi Peng,
Here is a suggestion:
subset(x, select = -a)
See ?subset for more details.
HTH,
Jorge
On Mon, Nov 2, 2009 at 8:31 PM, Peng Yu <> 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=cbin
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,]13
[2,]24
> colnames(x)=c('a','b')
> x
a b
[1,] 1 3
[2,] 2 4
> x[,-'a']
Error in -"a" : invalid ar
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