Hi Nicolas, Try (untested):
with(pop, table(factor(xloc, levels = 1:20), factor(loc, levels = 1:25))) HTH, Jorge On Wed, Sep 15, 2010 at 7:31 PM, Nicolas Gutierrez <> wrote: > Hi All, > > Im trying to superimpose (or "add") two matrices: > > 1. resulting from a table function with frequencies: > > > U=table(pop$xloc, pop$yloc)) > > 14 15 16 17 18 19 20 21 22 > 5 0 0 0 0 0 0 0 0 0 > 7 0 0 0 0 0 0 0 0 0 > 8 0 0 0 0 0 0 0 0 0 > 9 0 0 0 0 0 0 9 0 5 > 10 0 0 0 0 0 0 0 0 0 > 11 0 0 0 0 0 0 0 0 0 > > 2. The second created to match my spatial grid (20x25): > > > Uempty=matrix(data = 0, nrow = 20, ncol = 25) > > I want to place each element of U (e.g. U[22,9]=5) in the corresponding > cell of Uempty and end up with this final matrix like this: > > 1 2 3 ... 22 23 24 25 > 5 0 0 0 ... 0 0 0 0 > : : : : ... : : : : > 7 0 0 0 ... 0 0 0 0 > 8 0 0 0 ... 0 0 0 0 > 9 0 0 0 ... 5 0 0 0 > : : : : ... : : : : > 20 0 0 0 ... 0 0 0 0 > > Any ideas? > > Thanks!!! > > Nico > > ______________________________________________ > 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. > [[alternative HTML version deleted]]
______________________________________________ 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.
