Thanks, I have tried that, it does not work, because rowSums() calls callGeneric():
> Matrix:::rowSums(W) Error in callGeneric() : 'callGeneric' must be called from a generic function or method G. On Tue, Nov 22, 2011 at 3:20 PM, R. Michael Weylandt <michael.weyla...@gmail.com> wrote: > How about calling Matrix's namespace directly? > > Matrix:::rowSums() > > Michael > > 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. >> >> Thank You, Best Regards, >> Gabor >> >> -- >> Gabor Csardi <csa...@rmki.kfki.hu> MTA KFKI RMKI >> >> ______________________________________________ >> 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. > -- Gabor Csardi <csa...@rmki.kfki.hu> MTA KFKI RMKI ______________________________________________ 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.