PETSc version 3.17.0
MatGetValue
Gets a single value from a matrix
Synopsis
static inline PetscErrorCode MatGetValue(Mat mat,PetscInt row,PetscInt col,PetscScalar *va)
Not Collective; can only return a value owned by the given process
Input Parameters
| mat | - the matrix
|
| row | - the row location of the entry
|
| col | - the column location of the entry
|
Output Parameter
Notes
For efficiency one should use MatGetValues() and get several values simultaneously.
See notes for MatGetValues().
See Also
MatSetValue(), MatGetValueLocal(), MatGetValues()
Level
advanced
Location
src/mat/../../include/petscmat.h
Examples
src/snes/tutorials/ex48.c.html
src/ts/tutorials/ex14.c.html
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages