On Wed, Oct 16, 2019, 8:06 AM Iverson, Joseph W [MATH] <j...@iastate.edu> wrote:
> Dear GAP forum, > > Does anybody know of a way to efficiently get matrices (say with > cyclotomic entries) from GAP to MATLAB? For instance, is there a package to > export matrices as .mat files? > Suggested reply: One way to do this is to use GAP within SageMath, which has both a GAP interface and an Octave interface. > I have been getting by with a jerry-rigged solution where I make GAP print > a matrix like > A:=[[1,0],[0,1]];; > to a file "A.m" containing a single string like > "A=[1,0;0,1];". > Then I have MATLAB read the file as a script. That works fine for small > matrices, but for large ones (or for 3-tensors consisting of lots of > matrices) it is prohibitively slow, both for GAP to print to the file and > for MATLAB to interpret the result. > > For a sense of scale, at the moment I would like to export 95040 matrices > each of size 540x540 to MATLAB, preferably as a 3-tensor so that I can > easily iterate through the list. (The matrices are the image of a > representation of M12 having degree 540.) > > Best regards, > Joey Iverson > > Assistant Professor > Department of Mathematics > Iowa State University > > _______________________________________________ > Forum mailing list > fo...@gap-system.org > https://mail.gap-system.org/mailman/listinfo/forum > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/CAEQuuAUyZ6L%2BTEfFVJf1oD8ZWJuLZJUpoTU%2BV1cAJSCR2g9Mgg%40mail.gmail.com.
