scipy tutorial - Baustatik-Info-Server

SciPy Reference Guide, Release 0.8.dev
[3, 4, 6],
[0, 0, 7]])
>>> bmat( [[A,None],[None,C]] ).todense()
matrix([[1, 2, 0],
[3, 4, 0],
[0, 0, 7]])
hstack(blocks, format=None, dtype=None)
Stack sparse matrices horizontally (column wise)
See Also:
Parameters
blocks :
sequence of sparse matrices with compatible shapes
format : string
sparse format of the result (e.g. “csr”) by default an appropriate sparse matrix format
is returned. This choice is subject to change.
vstack
stack sparse matrices vertically (row wise)
Examples
>>> from scipy.sparse import coo_matrix, vstack
>>> A = coo_matrix([[1,2],[3,4]])
>>> B = coo_matrix([[5],[6]])
>>> hstack( [A,B] ).todense()
matrix([[1, 2, 5],
[3, 4, 6]])
vstack(blocks, format=None, dtype=None)
Stack sparse matrices vertically (row wise)
See Also:
Parameters
blocks :
sequence of sparse matrices with compatible shapes
format : string
sparse format of the result (e.g. “csr”) by default an appropriate sparse matrix format
is returned. This choice is subject to change.
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] ).todense()
390 Chapter 3. Reference