Hi
r-help-boun...@r-project.org napsal dne 05.05.2010 11:46:33:
>
> Dear list,
> I'm trying to concatenate the values of two columns but im not able to
do it:
>
> i have a dataframe with the following two columns:
>
> X VAR1 VAR2
> 1 2
> 2 1
> 3 2
> 4 3
> 5 4
> 6 4
>
>
> what i would like to obtain is:
> X VAR3
> 1 2
> 2 1
> 3 2
> 4 3
> 5 4
> 6 4
>
> I try with paste but what I obtain is:
> X VAR3
>
> 1 NA2
> 2 1NA
>
> 3 2NA
>
> 4 NA3
>
> 5 NA4
>
> 6 4NA
If your variables are numeric and if there are no values in both columns
i.e. when Var1 is NA Var 2 is number you can
rowSums(data.frame[,c("VAR1","VAR2")], na.rm=T)
Regards
Petr
>
> Thanks a lot!!
>
> [[alternative HTML version deleted]]
>
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