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. Best Regards, NILTON SANTOS
