Hi Mikael
You really need to provide a reproducible example in the future, it will
help people to better understand what you want to do and help you, and
help you better understand the answers as well.
Try something like this:
mat[apply(mat, 1, FUN=function(x) sum(x)=5),]
HTH,
Ivan
Le 3/4/2011 14:50, purna a écrit :
Rnoob here.
I have a matrix of zeroes ond ones. I want to delete the rows whose sum of
values is not =5, alternatively extract the rows who sum up to 5.
Thank you/Mikael
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Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
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