Hello Team I would like to add a new column (for example-Phase) from the below data set based on the conditions YEAR DAY X Y Sig 1 1981 9 -0.213 1.08 1.10 2 1981 10 0.065 1.05 1.05 *Conditions*
D$Phase=sapply(D,function(a,b) { a <-D$X b<-D$Y if (a<0 && b<0 && b<a) {phase=1} else if (a<0 && b<0 && b>a) {phase=2} else if (a<0 && b>0 && b<a) {phase=7} else if (a<0 && b>0 && b>a) {phase=8} else if (a>0 && b<0 && b<a) {phase=3} else if (a>0 && b<0 && b>a) {phase=4} else if (a>0 && b>0 && b>a) {phase=6} else (a>0 && b>0 && b<a) {phase=5} }) Can anyone help to fix the script to get a Phase column based on the conditions. The table will be like the below YEAR DAY X Y Sig Phase 1 1981 9 -0.213 1.08 1.10 phase=7 2 1981 10 0.065 1.05 1.05 phase=6 Many thanks Alea [[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.