creating a list of matrices or data frames
On Tue, Jan 20, 2009 at 10:34 AM, Simon Pickett <simon.pickett at bto.org> wrote:
Hi all,
How would you create a list of data.frames within a loop, then bind all the
elements of the list using rbind?
take this example of matrices with differing numbers of rows
for(i in 1:3){
assign(paste("s",i, sep=""),matrix(data = NA, nrow = i, ncol = 3, byrow =
FALSE, dimnames = NULL))
}
s1
s2
s3
I want to bind all the matrices at the end with do.call(rbind...) rather
than listing all the elements manually with rbind(s1,s2,s3...) and so on.
You might also want to have a look at the plyr package, http://had.co.nz/plyr, which provides general tools for performing these sorts of operations. Hadley