Module « scipy.sparse.csgraph »

Fonction csgraph_to_masked - module scipy.sparse.csgraph

Signature de la fonction csgraph_to_masked

Description

csgraph_to_masked.__doc__

    csgraph_to_masked(csgraph)

    Convert a sparse graph representation to a masked array representation

    .. versionadded:: 0.11.0

    Parameters
    ----------
    csgraph : csr_matrix, csc_matrix, or lil_matrix
        Sparse representation of a graph.

    Returns
    -------
    graph : MaskedArray
        The masked dense representation of the sparse graph.

    Examples
    --------
    >>> from scipy.sparse import csr_matrix
    >>> from scipy.sparse.csgraph import csgraph_to_masked

    >>> graph = csr_matrix( [
    ... [0, 1 , 2, 0],
    ... [0, 0, 0, 1],
    ... [0, 0, 0, 3],
    ... [0, 0, 0, 0]
    ... ])
    >>> graph
    <4x4 sparse matrix of type '<class 'numpy.int64'>'
        with 4 stored elements in Compressed Sparse Row format>

    >>> csgraph_to_masked(graph)
    masked_array(
      data=[[--, 1.0, 2.0, --],
            [--, --, --, 1.0],
            [--, --, --, 3.0],
            [--, --, --, --]],
      mask=[[ True, False, False,  True],
            [ True,  True,  True, False],
            [ True,  True,  True, False],
            [ True,  True,  True,  True]],
      fill_value=1e+20)