Dim argument must be a integer, see the return of: as.integer(slope*xdim)
Try this: udim <- ceiling(max(slope*xdim,5)) On Mon, Nov 30, 2009 at 5:15 PM, Rupert Mazzucco <[email protected]> wrote: > Hello, > > I'm running into a very strange problem: > >> xrange <- c(-2.5,2.5) >> xdim <- 100 >> mobility <- 0.1 >> slope <- 1.16 >> urange <- slope*xrange >> udim <- max(slope*xdim,5) >> du <- (urange[2]-urange[1])/udim >> uvec <- urange[1]+(1:udim-0.5)*du >> # type dependent weight function >> ckern <- array(0,dim=c(udim,udim)) >> diag(ckern) = wfun(uvec,slope,mobility) > Error in `diag<-`(`*tmp*`, value = c(0.992300064325398, 0.990746129315703, : > replacement diagonal has wrong length > > It turns out that the array ckern has the wrong size for some reason. > Instead of 116x116, it is only 115x115. > >> udim > [1] 116 >> length(uvec) > [1] 116 >> length(wfun(uvec,slope,mobility)) > [1] 116 >> dim(ckern) > [1] 115 115 > > The "taint" or whatever that is, is even transferable > >> n <- udim >> n > [1] 116 >> ckern <- array(0,dim=c(n,n)) >> dim(ckern) > [1] 115 115 >> m <- n >> m > [1] 116 >> ckern <- array(0,dim=c(m,m)) >> dim(ckern) > [1] 115 115 > > But when I set it explicitly, it does what it should: > >> n <- 116 >> n > [1] 116 >> ckern <- array(0,dim=c(n,n)) >> dim(ckern) > [1] 116 116 > > Note that the funny behavior seems to be peculiar to this one value of slope > <- 1.16, > many others work fine, e.g. > >> slope <- 1.08 >> urange <- slope*xrange >> udim <- max(slope*xdim,5) >> du <- (urange[2]-urange[1])/udim >> uvec <- urange[1]+(1:udim-0.5)*du >> # type dependent weight function >> ckern <- array(0,dim=c(udim,udim)) >> diag(ckern) = wfun(uvec,slope,mobility) >> dim(ckern) > [1] 108 108 > > This is R 2.10.0, but also happened in 2.8.0. Can anybody tell me what > is going on here, and how I can get my array to be the right size? > > Thanks, > Rupert > > ______________________________________________ > [email protected] 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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ [email protected] 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.
