[R] excluding NAs in data frame without deleting rows

Luc Villandre villandl at dms.umontreal.ca
Fri May 29 17:10:33 CEST 2009


Wade Wall wrote:
> Hi all,
>
> I have a binary matrix with NAs included.  Each row and column
> includes at least one NA, so I don't want to omit them.  Is there a
> way to sum across rows and columns, ignoring the NAs but not deleting
> the row or column?  If not, I suppose I can write a loop function, but
> I have learned that it is best to stay away from loops if possible.
>
> Thanks for any help,
>
> Wade
>
> ______________________________________________
> 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.
>   
Hi Wade,

The rowSums() and colSums() functions have a "na.rm" argument that you 
could set to TRUE.

Would this solve your problem?

Cheers,
-- 
*Luc Villandré*
/Biostatistician
McGill University Health Center -
Montreal Children's Hospital Research Institute/




More information about the R-help mailing list