Function

sparse_get_matrix_nonzero_count_for_column

Returns the number of nonzero values in a specified column of a matrix.

Declaration

long sparse_get_matrix_nonzero_count_for_column(void *A, sparse_index j);

Parameters

A

The sparse matrix object.

j

The zero based index of the row to query.

Return Value

The number of nonzero values in the specified column of the matrix. If j is out of bounds of the matrix, 0 is returned.

See Also

General Sparse Matrix Management Operations

sparse_commit

Forces any values recently added to the matrix to be put into the internal sparse storage format.

sparse_matrix_destroy

Releases any memory associated with the matrix object.

sparse_set_matrix_property

Sets the given property for a matrix object.

sparse_get_matrix_property

Returns the value of the given property name.

sparse_get_matrix_number_of_rows

Returns the number of rows of a matrix.

sparse_get_matrix_number_of_columns

Returns the number of columns of a matrix.

sparse_get_matrix_nonzero_count

Returns the number of nonzero values of a matrix.

sparse_get_matrix_nonzero_count_for_row

Returns the number of nonzero values in a specified row of a matrix.