On 29 March 2016 at 15:55, George Vega Yon wrote: | Hi there, | | A couple of days ago I included this comment on a Stackoverflow question about | "too large" matrices in RcppArmadillo | I wonder if we can use this in a package. After trying to compile the package | with and without PKG_CXXFLAGS=-DARMA_64BIT_WORD I'm still not able to create | sparse matrices bigger than 65,535 x 65,535. I've realized that the | RcppArmadilloConfig.h (version 0.6.600.4.0) file has ARMA_32BIT_WORD 1 so it | actually prevents using ARMA_64BIT_WORD (I think?). Any way I can solve this, | or I just have to deal with R (3.2.4 Revised (2016-03-16 r70336)) not been able | to handle 64INT? | | http://stackoverflow.com/questions/16159174/ | large-spmat-object-with-rcpparmadillo | | For which Dirk answered: | | Try locally setting ARMA_64BIT_WORD (check how) -- I can't at the package level | as it breaks existing code. It will likely help you. If you set it before the # | include <RcppArmadillo.h> things may just work. That at least is the pln. (And | you should have asked on rcpp-devel to get more than two eyeballs on this...) | And yes the other answer basically says the same thing. – Dirk Eddelbuettel 2 | days ago | | Now I'm asking again but on rcpp-devel =). The issue is that I'm concerned on | the part that Dirk says that "things may just work". I was reading about R not | been able to handle int64 and its implications for big matrices, and so I'm a | little concerned that if passing ARMA_64BIT_WORD works I may loose some | information on the way. For example, if I allow a users creating and | manipulating 1e6 x 1e6 sparse matrices, is there any chance for them to loose | information?
It is entirely possibly that nobody stresses RcppArmadillo this way and that setting ARMA_64BIT_WORD gets unset. I only know that I cannot set it globally now as some packages (still) depend on ARMA_32BIT_WORD. So I encourage you to experiment and to try locally. Maybe something can (and even should) be improved. Dirk | | Thanks, | | George G. Vega Yon | +1 (626) 381 8171 | http://www.its.caltech.edu/~gvegayon/ | _______________________________________________ | Rcpp-devel mailing list | Rcpp-devel@lists.r-forge.r-project.org | https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel -- http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org _______________________________________________ Rcpp-devel mailing list Rcpp-devel@lists.r-forge.r-project.org https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
