On Fri, Jun 10, 2022 at 3:59 PM NILTON SANTOS VALDIVIA < [email protected]> wrote:
> Hello Matthew, > > Thank you very much for your answer. What I'm trying to do is to solve a > linear system using the A and b (matrix and vector) provided in > https://sparse.tamu.edu/FEMLAB/waveguide3D (no matter if its a .mat or a > .mtx file) and also I want to solve the system with multiple MPI processes, > I'm not an expert on it, just starting to understand the procedure. I'd > really appreciate if you could help me with this exercise. > I would: 1) Download the Matrix Market format 2) Use Mat test ex72 to read that matrix + vector and output them in PETSc binary format 3) Use KSP ex10 to read the PETSc binary format and test your solver Thanks, Matt > Best Regards, > > NILTON SANTOS > > > El vie, 10 jun 2022 a las 19:57, Matthew Knepley (<[email protected]>) > escribió: > >> On Fri, Jun 10, 2022 at 1:15 PM NILTON SANTOS VALDIVIA < >> [email protected]> wrote: >> >>> Hello, >>> >>> I was trying to load a sparse matrix from a .MAT file (and solve the >>> linear system). But even though, I have extracted the A and b matrix and >>> vector from this suite *https://sparse.tamu.edu/FEMLAB/waveguide3D >>> <https://sparse.tamu.edu/FEMLAB/waveguide3D>* and saved the variables >>> (A, b) in a MAT file as PETSC recommends, I couldn't be able to load the >>> matrix. Is there something that I was doing wrong? or do you know a way to >>> load a matrix from the above link? >>> >>> Actually I was using src/ksp/ksp/tutorials/ex10.c.html >>> <https://petsc.org/main/src/ksp/ksp/tutorials/ex10.c.html> example to >>> try to load a .MAT file (containing A and b) without success. >>> >> >> Do you want to load a Matrix Market format matrix and vector? If so, this >> is what https://petsc.org/main/src/mat/tests/ex72.c.html does. >> >> Thanks, >> >> Matt >> >> >>> >>> Best Regards, >>> >>> NILTON SANTOS >>> >>> >> >> -- >> What most experimenters take for granted before they begin their >> experiments is infinitely more interesting than any results to which their >> experiments lead. >> -- Norbert Wiener >> >> https://www.cse.buffalo.edu/~knepley/ >> <http://www.cse.buffalo.edu/~knepley/> >> > -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
