On Tue, Apr 6, 2010 at 10:28 PM, David.Epstein <david.epst...@warwick.ac.uk> wrote: > > How do I append an R-object to a list? > I want to start with an empty list, and append R-objects one by one. > Does this start with a command like > mylist <- NULL > ?? > > I have read a few answers on R-help to questions like this, but they all > seem to be well off the point. Sometimes it's assumed that the list is a > vector---not my case. > One answer I read said that the object appended must be a list. This doesn't > make sense to me. I don't want a list of lists. I want a list of R-objects.
Start with an empty list() and just assign to the next element: > z=list() > z[[1]]=c(1,2,3) > z[[2]]=c(9,5,4) > z [[1]] [1] 1 2 3 [[2]] [1] 9 5 4 - that's a "list of R objects", in this case the R objects are simple vectors, but they could be any R objects - fitted models, spatial point patterns etc etc. Is that what you want? You can also just add elements by name: z = list() z$foo = c(1,2,3) z$fnord = "hello" z[[1]] and z[[2]] are also valid here. Barry ______________________________________________ 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.
