#11721: Silent failures in matrix code
------------------------------+---------------------------------------------
Reporter: rbeezer | Owner: jason, was
Type: defect | Status: needs_review
Priority: minor | Milestone: sage-4.7.2
Component: linear algebra | Keywords: beginner
Work_issues: | Upstream: N/A
Reviewer: | Author: Rob Beezer
Merged: | Dependencies:
------------------------------+---------------------------------------------
Changes (by newvalueoldvalue):
* keywords: => beginner
* status: new => needs_review
* author: => Rob Beezer
Old description:
> If you call `rows()` for a matrix and supply a bad argument, it just goes
> on its way.
>
> {{{
> sage: A = matrix(QQ, 2, range(4))
> sage: A.rows(1)
> [(0, 1), (2, 3)]
> }}}
>
> Same for columns.
>
> A request for a Jordan block of negative size just goes on its way.
>
> {{{
> sage: jordan_block(6.2, -8)
> []
> }}}
>
> Also - some general clean-up while I was in the area.
New description:
If you call `rows()` for a matrix and supply a bad argument, it just goes
on its way.
{{{
sage: A = matrix(QQ, 2, range(4))
sage: A.rows(1)
[(0, 1), (2, 3)]
}}}
Same for columns.
A request for a Jordan block of negative size just goes on its way.
{{{
sage: jordan_block(6.2, -8)
[]
}}}
Also - some general clean-up while I was in the area.
'''Apply''':
1. [attachment:trac_11721-matrix-arguments.patch]
--
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11721#comment:1>
Sage <http://www.sagemath.org>
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