[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
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Hi Wade,

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

Would this solve your problem?

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

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