Module « scipy.sparse »

Fonction vstack - module scipy.sparse

Signature de la fonction vstack

def vstack(blocks, format=None, dtype=None) 

Description

vstack.__doc__

    Stack sparse matrices vertically (row wise)

    Parameters
    ----------
    blocks
        sequence of sparse matrices with compatible shapes
    format : str, optional
        sparse format of the result (e.g., "csr")
        by default an appropriate sparse matrix format is returned.
        This choice is subject to change.
    dtype : dtype, optional
        The data-type of the output matrix. If not given, the dtype is
        determined from that of `blocks`.

    See Also
    --------
    hstack : stack sparse matrices horizontally (column wise)

    Examples
    --------
    >>> from scipy.sparse import coo_matrix, vstack
    >>> A = coo_matrix([[1, 2], [3, 4]])
    >>> B = coo_matrix([[5, 6]])
    >>> vstack([A, B]).toarray()
    array([[1, 2],
           [3, 4],
           [5, 6]])