Still confused with lapply

Thanks for your answer but do you have a solution using the function ?
I need to you use the data frame with a function (not the one given).

Thanks in advance again.
Ptit Bleu.

View this message in context: http://r.789695.n4.nabble.com/Still-confused-with-lapply-tp3050414p3050455.html
Sent from the R help mailing list archive at Nabble.com.