int HYPRE_StructMatrixSetBoxValues (HYPRE_StructMatrix matrix, int *ilower, int *iupper, int nentries, int *entries, double *values) Set matrix coefficients a box at a time
Set matrix coefficients a box at a time. The data in values is ordered
as follows:
m = 0;
for (k = ilower[2]; k <= iupper[2]; k++)
for (j = ilower[1]; j <= iupper[1]; j++)
for (i = ilower[0]; i <= iupper[0]; i++)
for (entry = 0; entry < nentries; entry++)
{
values[m] = ...;
m++;
}
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