[petsc-users] How to dump the nonzero entries of matrix into a file?

[hxie at umn.edu]

Hi, 

Thanks. But if I try to dump it into an ascii file  using the following:
---
       call 
PetscViewerASCIIOpen(PETSC_COMM_WORLD,"matrix.dat",FILE_MODE_WRITE,viewer,pterr)
        call PetscViewerSetFormat(viewer,PETSC_VIEWER_ASCII_MATLAB,pterr)
        call MatView(ptMat,viewer,pterr)
---

It gives some errors:
[0]PETSC ERROR: Caught signal number 10 BUS: Bus Error, possibly illegal 
memory access


Bests,
Hui