On similar lines, how do I assign the position of the an occurence of a value say 7 in a data vector to another data vector?
> nFields [1] 6 6 6 6 6 6 7 7 6 6 6 7 6 6 6 6 I need the output data vector showing occurence of 7 as: [1] 7 8 12 I tried following but both has errors xFields7 <- NULL for (i in 1:length(nFields)) { c(xFields7,ifelse(nFields[i] == 7,i,NULL)) -> xFields7 } xFields7 <- NULL for (i in 1:length(nFields)) { if nFields[i] == 7 then c(xFields7,i) -> xFields7 } [[alternative HTML version deleted]] ______________________________________________ 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.