Hi Erik, what if I do some manipulations on the new list created with split and I want to come back to its initial form? I saw you have the unsplit function but I get errors. What I am doing is that I use as the "f" function as in the help the same initial f I used to split but I get the following error: Error in x[i] <- value[[j]] : replacement has length zero
----- Anna Lippel -- View this message in context: http://n4.nabble.com/smart-way-to-turn-a-vector-into-a-matrix-tp1692671p2015952.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.