On Mar 22, 2010, at 9:51 PM, tj wrote:
Hi all,
May I request for your help if you have time and if you have an idea
on how
to do this. I want to add three vectors... And my goal is to obtain
the sum
of the vectors, ignoring the vector of "na"...
Here is what i did in R.. I'm adding the three vectors, e,z,k, and my
objective is to get an answer = -23.
I tried putting the na.omit but it did not work. Thanks.
z
[1] -12 -9
e
[1] -2 0
k
[1] NA NA
sum(z+e+k)
[1] NA
?sum note na.rm and do not use "+".
> sum(z, e, k, na.rm=T)
[1] -23
David Winsemius, MD
West Hartford, CT
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