[R] function - access column

[R. Michael Weylandt <michael.weylandt@gmail.com>]

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 <rrasterr at 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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