On 09/05/2011 9:18 AM, Patrick Breheny wrote:
On 05/09/2011 08:58 AM, Alaios wrote: > Dear all, > I would like to ask your help concerning an error message I get. > > I have the following struct > > str(CRagentInTime[[1]]) > List of 2 > $ timelag: int 0 > $ CRagent:List of 50 > ..$ :List of 3 > .. ..$ CRmap: num [1:256, 1:256] NA NA NA NA NA NA NA NA NA NA ... > .. ..$ xy : num [1:2] 10 177 > .. ..$ sr : num [1:49] -94.9 -92.8 -79.5 -97.6 -78.4 ... > > and I wanted to select all the sr fields for every of each one of the 50 CRagent Lists I have. > > So I tried something like > > str(CRagentInTime[[1]][[2]][[1:10]]$sr) and I get a message that > Error in CRagentInTime[[1]][[2]][[1:10]] : > recursive indexing failed at level 3Selecting multiple elements of a list using an expression like [[1:10]] does not work. For example: x<- list("a","b") x[[1:2]] produces Error in x[[1:2]] : subscript out of bounds In general, the expression x[[1:2]] is not meaningful, as the elements of the list may be of different type, with no way to concatenate them.
That's the wrong explanation: the expression x[[1:2]] is meaningful, but it means the same thing as x[[1]][[2]], not
c(x[[1]], x[[2]]). Duncan Murdoch
> > strange to me is that this one works > > str(CRagentInTime[[1]][[2]][[1]]$sr) > num [1:49] -106 -92.9 -101.3 -81.9 -96.7 ... > > > I would like to thank you in advance for your help > Best Regards > Alex > _______________________ Patrick Breheny Assistant Professor Department of Biostatistics Department of Statistics University of Kentucky ______________________________________________ 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.
______________________________________________ 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.
