[R] rowsum- is there a countsum

[Gabor Grothendieck]

Try this (adding 0 converts the logicals to numeric):

rowsum((X > 0)+0, group)


On Jan 26, 2008 9:13 AM, Anders Bjørgesæter <abjrges at getmail.no> wrote:
> Hello
>
> Is there an analogous function to "rowsum" that count the numbers
> according to a given vector (preferably larger than a given value)
> instead of summing them?
>
> E.g. rowsum(x, group)
>
> X is the dataframe,     A       B       C
>                        5       0       0
>                        1       3       3
>                        0       1       12
> and group is the vector; 1,1,2
>
> rowsum gives:           A       B       C
>                1       6       3       3
>                2       0       1       12
>
>
> I want:                 A       B       C
>                1       2       1       1
>                2       0       1       1
>
> for e.g. count all > 0.
>
> Best Regards
> Anders
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>