Hi, I have a data frame like this:
> head(a) FID LASER2 CURRELIG PLASER RTNPTHY 1 fam1000_G1000 1 1 1 1 2 fam1001_G1001 1 1 1 1 3 fam1003_G1003 2 1 2 2 4 fam1005_G1005 1 1 1 2 5 fam1009_G1009 1 1 1 2 6 fam1052_G1052 1 1 1 2 ... I would like to create a new column called PHENO which would satisfy these conditions: if CURRELIG=1 and RTNPTHY=1 than PHENO=1 if PLASER=2 than PHENO=2 otherwise is -9 Thanks Ana [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.