#4650: matrix_modn_sparse needs cleanup
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Reporter: boothby | Owner: boothby
Type: defect | Status: new
Priority: minor | Milestone: sage-3.2.2
Component: linear algebra | Keywords: sparse
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matrix_modn_sparse needs some housecleaning. One gem, in particular:
{{{
cdef Py_ssize_t i, j, k
k = 0
for i from 0 <= i < self._nrows:
for j from 0 <= j < self.rows[i].num_nonzero:
k+=1
return QQ(k)/QQ(self.nrows()*self.ncols())
}}}
also, it could use some fast nonzero_positions, getitem, etc. methods
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4650>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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