[R] replacing elements of vector through elements of another vector
Marcus Mund
marcus.mund at uni-jena.de
Wed Jul 27 16:52:41 CEST 2011
Hello everybody,
I hope this question is not too silly but I'm almost going crazy about
that and could not find a solution.
I have two variables, say A and B and I would like to combine them in C.
In particular I want a C-value of B when B is not NA and the A value in
case that B is NA:
A B C
2 NA 2
3 4 4
NA 3 3
4 1 1
2 NA 2
1 4 4
NA NA NA
5 3 3
4 1 1
I tried something like:
C <- B #assigning variable B to variable C
C[is.na(B) & A >= 0] <- A #using value of A in case that B is na
but this results in an error message about the unequal length of the
replacement and what has to be replaced...
I guess I am too deep in the problem to see the (probably) easy
solution, hence any hints and advices are appreciated.
Thank you very much!
Marcus
--
Dipl.-Psych. Marcus Mund
Friedrich-Schiller-University Jena
Institute for Psychology
Department of Personality Psychology and Psychological Assessment
Humboldtstraße 11/Raum 111
07743 Jena, Germany
Tel.: +49 3641/9-45 960
Mail: marcus.mund at uni-jena.de
Fingerprint: 6B15F90EA7752D9E327A055427F4F5DC255188C4
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