scipy.sparse.vstack¶
- scipy.sparse.vstack(blocks, format=None, dtype=None)[source]¶
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]])