I do not fully understand your question but how about :
inplace <- function( df, cond1, cond2, cols, suffix ){
w <- which( cond1 & cond2 )
df <- df[ w, cols ]
paste(df, suffix)
return(df)
}
BTW, did you mean "colnames(df) <- paste(colnames(df), suffix)" instead
of "paste(df, suffix)" ?
Regards, Adai
On Fri, 2006-06-16 at 10:23 +0100, David Hugh-Jones wrote:
> I get tired of writing, e.g.
>
>
> data.frame[some.condition & another.condition, big.list.of.columns] <-
> paste(data.frame[some.condition & another.condition,
> big.list.of.columns], "foobar")
>
>
> I would a function like:
>
> inplace(paste(data.frame[some.condition & another.condition,
> big.list.of.columns], "foobar"))
>
> which would take the first argument of the inner function and assign
> the function's result to it.
>
> Has anyone done something like this? Are there simple alternative
> solutions that I'm missing?
>
> Cheers
> David
>
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