pysal.lib.weights.spw_from_gal¶

pysal.lib.weights.spw_from_gal(galfile)[source]¶

Sparse scipy matrix for w from a gal file.

Parameters:	galfile : string name of gal file including suffix
Returns:	spw : sparse_matrix scipy sparse matrix in CSR format ids : array identifiers for rows/cols of spw

Examples

>>> import pysal.lib
>>> spw = pysal.lib.weights.user.spw_from_gal(pysal.lib.examples.get_path("sids2.gal"))
>>> spw.sparse.nnz
462