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.m...@uni-jena.de Fingerprint: 6B15F90EA7752D9E327A055427F4F5DC255188C4 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
