"miguel manese" <[EMAIL PROTECTED]> writes: > Hello, > > I created an S3 "type" w/c is actually a list that should look like a > matrix but whose data is actually in an external file. The SEXP just > contains info on how to retrieve the data from the file. When I get to > the part of creating the SEXP, I found out that SET_DIM & SET_DIMNAME > checks the SEXP if the length matches (somewhere in src/main/attrib.c, > dimgets & dimnamegets IIRC (it's on my other partition. life sucks)). > After a quick look at the R code, I tried to bypass them by doing:
If you want to emulate a matrix-like object you might want to look at the Matrix package which does uses S4 classes to represent matrices. I don't think the class systems are fully functional at the C-level of R; macros like SET_DIM don't do dispatch beyond the built-in SEXP types. + seth ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
