On 23.11.2011 03:18, Gabor Grothendieck wrote:
On Tue, Nov 22, 2011 at 3:16 PM, Gábor Csárdi<csa...@rmki.kfki.hu> wrote:Dear All, in some functions of my package, I use the Matrix S4 class, as defined in the Matrix package. I don't want to depend on Matrix, however, because my package is perfectly fine without Matrix, most of the functionality does not need Matrix. Matrix is so included in the 'Suggests' line. I load Matrix via require(), from the functions that really need it. This mostly works fine, but I have an issue now that I cannot sort out. If I define a function like this in my package: f<- function() { require(Matrix) res<- sparseMatrix(dims=c(5, 5), i=1:5, j=1:5, x=1:5) y<- rowSums(res) res / y } then calling it from the R prompt I get Error in rowSums(res) : 'x' must be an array of at least two dimensions which basically means that the rowSums() in the base package is called, not the S4 generic in the Matrix package. Why is that? Is there any way to work around this problem, without depending on Matrix? I am doing this on R 2.14.0, x86_64-apple-darwin9.8.0.Try adding these three lines to the package: rowSums<- function(x, na.rm = FALSE, dims = 1L) UseMethod("rowSums") rowSums.dgCMatrix<- Matrix:::rowSums rowSums.default<- base::rowSums
Folks, please not, just import relevant functionality from the *recommended* package Matrix. Messing around even more is certainly less helpful than importing relevant part from a Namespace/package that you will use anyway.
Best, Uwe Ligges ______________________________________________ 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.
