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...;_sqrt")) data$newvar<-sqrt(data[[emotions[i]]]) Example 3 newvar<-toString(paste0(emotions[[i]],"_sqrt")) data$newvar[1]<-sqrt(data[[emotions[i]]]) -- View this message in context: http://r.789695.n4.nabble.com/Efficiently-creating-defining-new-variables-transformations-tp4650401.html Sent from the R help mailing list archive at Nabble.com.