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Hey everybody, I am looking for a way to loop commands over several variables in a dataframe. Basically I want to do something like this: ti1<-aggregate(dataframename$y1, by=data.frame(dataframename$aggregationvar), sum,na.rm=TRUE) This works fine as it is but i want to do it for several variables thereby generating several tix. I tried with a for-loop but the

Hey everyone, I have again a loop question: After generating the dataset using Jan?s approach from my previous posting (http://r.789695.n4.nabble.com/Loop-over-several-variables-td4648112.html) I want to rename the Variables in the new dataset so that all y will be called tiy. Doing it separately the following line works fine: ti<-rename (ti,c(y5="tiy5")) So I thought I simply