scipy.sparse.hstack

scipy.sparse.hstack(blocks, format=None, dtype=None)

Stack sparse matrices horizontally (column wise)

Parameters

blocks

sequence of sparse matrices with compatible shapes

formatstr

sparse format of the result (e.g. “csr”) by default an appropriate sparse matrix format is returned. This choice is subject to change.

dtypedtype, optional

The data-type of the output matrix. If not given, the dtype is determined from that of blocks.

See also

vstack

stack sparse matrices vertically (row wise)

Examples

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