[petsc-users] confusion about MatSetValues(A, ,ADD_VALUES);

[Jed Brown]

丁老师 <ztdepyahoo at 163.com> writes:

> I write a simple c procedure to test the MatSetValues.  the main body of procedure is like this
>         
>      int row=1;
>      int col=10;
>      double v=1.0;
>    
>      MatSetValues(A,1,&row,1,&col,&v,INSERT_VALUES);
>       MatSetValues(A,1,&row,1,&row,&v,ADD_VALUES);
>       MatSetValues(A,1,&col,1,&col,&v,ADD_VALUES);

You can't mix INSERT_VALUES and ADD_VALUES.  Please use debugging PETSc
for development.  It warns about this.