At first I was actually thinking about this situation, which cannot work:| data.frame(x = 1:3, y = list(1:2, 1:3, 1:4))
|But I had never thought about this:| df$y <-list(1:2, 1:3, 1:4)| And it actually makes sense. The final requirement here is that all columns must have the same length! I'm not sure though why one would need that. Why not use lists in that case? Thanks! Ivan -- Dr. Ivan Calandra TraCEr, laboratory for Traceology and Controlled Experiments MONREPOS Archaeological Research Centre and Museum for Human Behavioural Evolution Schloss Monrepos 56567 Neuwied, Germany +49 (0) 2631 9772-243 https://www.researchgate.net/profile/Ivan_Calandra On 25/07/2018 11:56, Juan Telleria Ruiz de Aguirre wrote: >> Just for my understanding: >> Is a data.frame with list columns still a data.frame? Isn't it then a list? > * A data.frame (or tibble) is a list of columns. > * In which each column must be from the same data type, in this case list(). > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
