hadley wickham
2009-Jan-19 15:18 UTC
[Rd] Floating point excepting when cbind()ing a matrix of grobs (or environments) with a 0-column matrix
library(grid) e <- rectGrob() # OR: # e <- environment() a <- matrix(list(e), ncol = 1, nrow = 2) b <- matrix(ncol = 0, nrow = 2) cbind(a, b) cbind(a, b) This reliably crashes R for me. I realise this is a rather esoteric error condition, but it crops up for me when creating matrices of grobs to be turned into a ggplot2 plot. Hadley -- http://had.co.nz/
William Dunlap
2009-Jan-19 18:44 UTC
[Rd] Floating point excepting when cbind()ing a matrix of grobs (orenvironments) with a 0-column matrix
I think the following patch to src/main/bind.c fixes it up. If the length of an argument to [cr]bind is 0 then it wont't try to add any data from it to the output any more, just as is done with the other modes of data. It was getting the FPE from i%k when k==0. Index: src/main/bind.c ==================================================================--- src/main/bind.c (revision 47617) +++ src/main/bind.c (working copy) @@ -1218,10 +1218,12 @@ case LISTSXP: PROTECT(u = coerceVector(u, mode)); k = LENGTH(u); - idx = (!isMatrix(u)) ? rows : k; - for (i = 0; i < idx; i++) - SET_VECTOR_ELT(result, n++, - duplicate(VECTOR_ELT(u, i % k))); + if (k>0) { + idx = (!isMatrix(u)) ? rows : k; + for (i = 0; i < idx; i++) + SET_VECTOR_ELT(result, n++, + duplicate(VECTOR_ELT(u, i % k))); + } UNPROTECT(1); break; default: Bill Dunlap TIBCO Software Inc - Spotfire Division wdunlap tibco.com> -----Original Message----- > From: r-devel-bounces at r-project.org > [mailto:r-devel-bounces at r-project.org] On Behalf Of hadley wickham > Sent: Monday, January 19, 2009 7:18 AM > To: r-devel at r-project.org > Subject: [Rd] Floating point excepting when cbind()ing a > matrix of grobs (orenvironments) with a 0-column matrix > > library(grid) > e <- rectGrob() > # OR: > # e <- environment() > > a <- matrix(list(e), ncol = 1, nrow = 2) > b <- matrix(ncol = 0, nrow = 2) > > cbind(a, b) > > cbind(a, b) > > This reliably crashes R for me. > > I realise this is a rather esoteric error condition, but it crops up > for me when creating matrices of grobs to be turned into a ggplot2 > plot. > > Hadley > > -- > http://had.co.nz/ > > ______________________________________________ > R-devel at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel >