Try

test$Sum <- rowSums(test, na.rm = TRUE)
test

HTH,
Jorge


On Fri, Aug 5, 2011 at 2:01 PM, Dimitri Liakhovitski <> wrote:

> Hello!
>
> I have a data frame with some NAs.
> test<-data.frame(a=c(1,2,NA),b=c(10,NA,20))
>
> I need to sum up values in 2 variables. However:
> test$a+test$b
> procudes NAs in rows that have NAs.
>
> How could I sum up columns while ignoring NAs (the way the function
> sum(..., na.rm=T) works?
> Thank you!
> --
> Dimitri Liakhovitski
> marketfusionanalytics.com
>
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> and provide commented, minimal, self-contained, reproducible code.
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