On Sun, May 19, 2013 at 7:02 PM, peter dalgaard <pda...@gmail.com> wrote: > (The first example really had 2:3, not 5:7, right?) > Indeed. I simplified the example mid-email.
> The essential bit is that to assign to the 2nd element of a list, it needs to > have at least two elements: > Thanks for the explanations. Regards, Liviu >> x <- list() >> x[[2]] <- 123 >> x > [[1]] > NULL > > [[2]] > [1] 123 > > assigning to an element with a specific name just requires there is an > element of that name: > >> x[["2"]] <- 321 >> x > [[1]] > NULL > > [[2]] > [1] 123 > > $`2` > [1] 321 > > In both cases, x will be extended if needed, so that the required element > exists. Notice that there is no relation between the name and the number of a > list element; e.g., x[["2"]] is the 3rd element in the above example. > > > -- > Peter Dalgaard, Professor, > Center for Statistics, Copenhagen Business School > Solbjerg Plads 3, 2000 Frederiksberg, Denmark > Phone: (+45)38153501 > Email: pd....@cbs.dk Priv: pda...@gmail.com > > > > > > > > -- Do you know how to read? http://www.alienetworks.com/srtest.cfm http://goodies.xfce.org/projects/applications/xfce4-dict#speed-reader Do you know how to write? http://garbl.home.comcast.net/~garbl/stylemanual/e.htm#e-mail ______________________________________________ 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.
