Dear voidobscura,
Try either:
colSums(mdat)
# or
apply(mdat, 2, sum)
See ?colSums and ?apply for more details.
HTH,
Jorge
On Thu, Jul 16, 2009 at 2:25 PM, voidobscura <nshah...@gmail.com> wrote:
>
> Alright, so I am trying to write my own function to calculate column sums
> in
> a matrix. I want the result as a single list with the values.
>
> So far I have:
>
> csum<-function(m)
> {
> a = data.frame(m)
> s = lapply(a,sum)
> return(s)
> }
>
> What is the easiest way to have it return in a format such as [1] 6 15 24 ?
>
> Thanks.
> --
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>
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