MatStructure#

Indicates if two matrices have the same nonzero structure

Synopsis#

typedef enum {
  DIFFERENT_NONZERO_PATTERN,
  SUBSET_NONZERO_PATTERN,
  SAME_NONZERO_PATTERN,
  UNKNOWN_NONZERO_PATTERN
} MatStructure;

SAME_NONZERO_PATTERN - the two matrices have identical nonzero patterns
DIFFERENT_NONZERO_PATTERN - the two matrices may have different nonzero patterns
SUBSET_NONZERO_PATTERN - the nonzero pattern of the second matrix is a subset of the nonzero pattern of the first matrix
UNKNOWN_NONZERO_PATTERN - there is no known relationship between the nonzero patterns. In this case the implementations may try to detect a relationship to optimize the operation