Thanks! It helps. I completely forgot about the colnames function
I added a "which(colnames(m)==n)" to my own function and now I can
access with no problem the column by the number instead of the name.
On Fri, Oct 7, 2011 at 5:09 PM, R. Michael Weylandt
<michael.weyla...@gmail.com> <michael.weyla...@gmail.com> wrote:
> Perhaps something like this:
>
> Test <- function(m){
> m <- if(is.character(m)) get(m) else m
> stopifnot(length(colnames(m))>0)
> n = colnames(m)
> # Process n however
> 2* m[, n]
> }
>
> That make sense?
>
> Hope it helps,
> Michael
>
>
> On Oct 7, 2011, at 11:03 AM, Ana <rrast...@gmail.com> wrote:
>
>> How can I call matrix$col, inside a function?
>> The matrix name is one of the variables of the function, while the
>> column name I get by assuming that it should have a certain
>> characters.
>>
>> something like this
>>
>> function(matrix){
>> colname=as.name(grep("[A-T a-t]ting",colnames(matrix),value=TRUE))
>> output=2*(matrix$colname)
>> return(output)
>> }
>>
>> The name of the column is Testing.
>>
>> ______________________________________________
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>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
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