Hi, this might be a vague question but is it possible to create a random rectangular matrix in PETSc of arbitrary specified dimension? More specifically, I would like the rectangular matrix to be sparse and have 1.14% non-zeros in the matrix.
If there is no such direct way, is there a way for MATLAB to do this and then possibly output it to a text file so that it could be fed to PETSc? The thing is I want to know how fast PETSc does least squares problems |Ax-b| for matrices A of dimensions like 2683x1274 where A is sparse with about 1.14% non-zeros. If you have any kind of timing studies / weblinks describing how fast PETSc does least square problems that would be really helpful. Sincere thanks, Gaurish. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20110116/c7c35065/attachment.htm>
