PETSc version 3.17.4
Fix/Edit manual page

# MatGetColumnSumsRealPart

Gets the sums of the real part of each column of a sparse or dense matrix.

### Synopsis

    #include "petscmat.h"
    PetscErrorCode MatGetColumnSumsRealPart(Mat A,PetscReal sums[])

### Input Parameter

| A | - the matrix

### Output Parameter

| sums | - an array as large as the TOTAL number of columns in the matrix

### Notes

Each process has ALL the column sums after the call. Because of the way this is computed each process gets all the values, if each process wants only some of the values it should extract the ones it wants from the array.

### See Also

MatGetColumnSumsImaginaryPart(), VecSum(), MatGetColumnMeans(), MatGetColumnNorms(), MatGetColumnReductions()

### Level

intermediate

### Location

src/mat/utils/getcolv.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages