Dear Prof Ripley,

It is a feature. Other parts of R expect a CHARSXP to have length less than or equal to 2^31 - 1.

OK, after looking closer at the code and comments in memory.c and Rinternals.h (typedef int R_len_t;) I realized that.



Could you not use x = allocVector(REALSXP, vs) and REAL(x)[i]? That will get you up to 2^31 - 1 elements, which is the R limit AFAIK.

Thanks, that is an excellent idea. It should be fine for my immediate needs, and better what I've just been doing with Calloc!


> Because of the use of Fortran, it is hard to see how to allow internal
> lengths (in elements, not necessarily bytes) to exceed that value.  We
> need to return to that, but it is not straightforward and last time we
> discussed it we agreed to defer it.

> We can manage a better error message, but I am afraid nothing else in
> the near future.

In the application that triggered this posting, the memory is for a C array of doubles within a user-defined C function, not for anything that needs to become an R object, so maybe a suggestion would be to make R_alloc go directly to malloc without the detour over allocString or allocVector; or something along that line?

 Best regards
  Wolfgang

-------------------------------------
Wolfgang Huber
European Bioinformatics Institute
European Molecular Biology Laboratory
Cambridge CB10 1SD
England
Phone: +44 1223 494642
Fax:   +44 1223 494486
Http:  www.ebi.ac.uk/huber

______________________________________________
R-devel@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel

Reply via email to