Hi everyone, I've got a dataset with 12,000 observations. One of the variables (cleary$D1) is for an individual's country, coded 1 - 15. I'd like to create a dummy variable for the Baltic states which are coded 4,6, and 7. In other words, as a dummy variable Baltic states would be coded 1, else 0. I've attempted the following for loop:
dummy <- matrix(NA, nrow=nrow(cleary), ncol=1) for (i in 1:length(cleary$D1)){ if (cleary$D1 == 4){dummy[i] = 1} else {dummy[i] = 0} } Unfortunately it generates the following error: 1: In if (cleary$D1 == 4) { ... : the condition has length > 1 and only the first element will be used Another options I've tried is the following: binary <- vector(length=length(cleary$D1)) for (i in 1:length(cleary$D1)) { if (cleary$D1 == 4 | cleary$D1 == 6 | cleary$D1 == 7 ) {binary[i] = 1} else {binary[i] = 0} } Unfortunately it simply responds with "syntax error". Any thoughts would be greatly appreciated! -- View this message in context: http://r.789695.n4.nabble.com/For-loop-dummy-variables-tp3001396p3001396.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.