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

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 :None:None:`blocks`.

Stack sparse matrices vertically (row wise)

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]])

See :

Back References

The following pages refer to to this document either explicitly or contain code examples using this.

scipy.sparse._construct.hstack scipy.sparse._construct.vstack

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