coo_matrix.py

Define the COOmatrix class.

class openmdao.matrices.coo_matrix.COOMatrix(submats)

Bases: Matrix

Sparse matrix in Coordinate list format.

Used with the SplitJacobian to represent the dr/do and dr/di matrices, to form a matvec product with the d_outputs and d_inputs vectors respectively.

Parameters:

submatsdict

Dictionary of sub-jacobian data keyed by (row_name, col_name).

Attributes:

_coocoo_matrix

COO matrix. Used as a basis for conversion to CSC, CSR, Dense in inherited classes.

_matrix_Tsparse matrix

Transpose of the matrix. Only computed if needed for reverse mode for CSC or CSR matrices.

_coo_slicesdict

Dictionary of slices into the COO matrix data/rows/cols for each sub-jacobian.

__init__(submats)

Initialize all attributes.

dump(msginfo)

Dump the matrix to stdout.

Parameters:

msginfostr

Message info.

todense()

Return a dense version of the matrix.

Returns:

ndarray

Dense array representation of the matrix.

transpose()

Transpose the matrix.

Returns:

coo_matrix

Transposed matrix.