[R] question
R. Michael Weylandt
michael.weylandt at gmail.com
Tue Feb 14 13:12:39 CET 2012
Perhaps something (untested) like
sapply(split(x, rownames(x)), colSums)
Next time it's suggested you use dput() to send your data.
Michael
On Tue, Feb 14, 2012 at 7:08 AM, Soheila Khodakarim
<lkhodakarim at gmail.com> wrote:
> I have this matrix in R,
>
>
> s1 s2 s3 s4
> g1 1 0 0 0
> g1 0 1 0 0
> g1 0 0 1 0
> g2 1 0 0 0
> g2 0 1 0 0
> g3 1 0 0 0
> g4 0 0 1 0
> g4 1 0 0 0
> g4 0 1 0 0
> g4 0 0 0 1
>
>
> I want to split this matrix based on its rows then sum based on columns,
> finally I want to make this matrix:
>
> s1 s2 s3 s4
> g1 1 1 1 0
> g2 1 1 0 0
> g3 1 0 0 0
> g4 1 1 1 1
>
> I will appreciate if you guide me.
>
> Regards,
> Soheila
>
> [[alternative HTML version deleted]]
>
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