#10028: inconsistent error messages for inverting singular matrices
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Reporter: dmharvey | Owner: jason, was
Type: defect | Status: needs_review
Priority: trivial | Milestone: sage-4.6.2
Component: linear algebra | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by rbeezer):
I just noticed these weak error messages the other day - it'd be great to
have all the cases of non-invertible matrices give a common, and
informative, message. Two suggestions:
(a) At the sage prompt run {{{search_src("ZeroDivisionError")}}} and I
think you will find two or three more places in the matrix code that could
also be improved.
(b) For Python 3 raising an error will require syntax like:
{{{
raise ZeroDivisionError("input matrix must be nonsingular")
}}}
Might as well do it that way now.
Rob
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10028#comment:2>
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