On Thu, Nov 19, 2009 at 2:21 PM, Peng Yu <pengyu...@gmail.com> wrote: > There are a few version of apply() (e.g., lapply(), sapply()). I'm > wondering if there is one that does not return anything but just > silently apply a function to the list argument. > > For example, the plot function is applied to each element in 'alist'. > It is redundant to return anything from apply. > > apply(alist,function(x){ plot each element of alist})
Take a look at the l_ply(), a_ply() and d_ply() functions from Hadley's "plyr" package. They are a refinement and extension to the apply family of functions and the underscore, "_", in the function names indicates that they have no return value. -Charlie ______________________________________________ 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.