[petsc-users] Precision of MatView

Sanjay Govindjee s_g at berkeley.edu
Tue May 14 18:14:24 CDT 2019


I am using the following bit of code to debug a matrix.  What is the 
expected precision of the numbers that I will find in my ASCII file?
As far as I can tell it is not the full double precision that I was 
expecting.

             call PetscViewerASCIIOpen(PETSC_COMM_WORLD, 
tangview,K_view, ierr)
             call PetscViewerSetFormat(K_view, 
PETSC_VIEWER_ASCII_MATLAB, ierr)
             call MatView                     (Kmat, K_view, ierr)

-sanjay



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