#10928: numpy matrices indexed by sage integers are wrong
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Reporter: flawrence | Owner: tbd
Type: defect | Status: new
Priority: critical | Milestone: sage-4.7
Component: packages | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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When using numpy matrices, indexing behaves differently depending on
whether sage integers or python integers are used to do the indexing
{{{
sage: mymat = numpy.matrix(numpy.arange(6).reshape(3,2))
sage: mymat[:,0]
matrix([[0, 2, 4]])
sage: mymat[:,int(0)]
matrix([[0],
[2],
[4]])
}}}
The second behaviour is correct, i.e. int(0) gives the correct answer.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10928>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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