#11558: Echelonize with transformation=True oddness for sparse matrix
------------------------------+---------------------------------------------
Reporter: vbraun | Owner: jason, was
Type: defect | Status: positive_review
Priority: major | Milestone: sage-4.7.2
Component: linear algebra | Keywords:
Work_issues: | Upstream: N/A
Reviewer: Rob Beezer | Author: Volker Braun
Merged: | Dependencies:
------------------------------+---------------------------------------------
Description changed by jdemeyer:
Old description:
> {{{
> sage: matrix(ZZ, 3, 4, [1..12],
> sparse=False).echelon_form(transformation=True)
> (
> [ 1 2 3 4] [ 0 2 -1]
> [ 0 4 8 12] [ 0 9 -5]
> [ 0 0 0 0], [ 1 -2 1]
> )
> sage: matrix(ZZ, 3, 4, [1..12],
> sparse=True).echelon_form(transformation=True)
> ---------------------------------------------------------------------------
> TypeError Traceback (most recent call
> last)
>
> /home/vbraun/opt/sage-4.7.1.alpha3/devel/sage-main/<ipython console> in
> <module>()
>
> /home/vbraun/Sage/sage/local/lib/python2.6/site-
> packages/sage/matrix/matrix2.so in
> sage.matrix.matrix2.Matrix.echelon_form (sage/matrix/matrix2.c:27633)()
>
> /home/vbraun/Sage/sage/local/lib/python2.6/site-
> packages/sage/matrix/matrix2.so in sage.matrix.matrix2.Matrix.echelonize
> (sage/matrix/matrix2.c:27292)()
>
> /home/vbraun/Sage/sage/local/lib/python2.6/site-
> packages/sage/matrix/matrix2.so in
> sage.matrix.matrix2.Matrix._echelonize_ring
> (sage/matrix/matrix2.c:26560)()
>
> TypeError: Cannot convert tuple to sage.matrix.matrix2.Matrix
> }}}
>
> '''Appy''':
> 1. [attachment: trac_11558_echelon_form_with_transformation.patch]
New description:
{{{
sage: matrix(ZZ, 3, 4, [1..12],
sparse=False).echelon_form(transformation=True)
(
[ 1 2 3 4] [ 0 2 -1]
[ 0 4 8 12] [ 0 9 -5]
[ 0 0 0 0], [ 1 -2 1]
)
sage: matrix(ZZ, 3, 4, [1..12],
sparse=True).echelon_form(transformation=True)
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
/home/vbraun/opt/sage-4.7.1.alpha3/devel/sage-main/<ipython console> in
<module>()
/home/vbraun/Sage/sage/local/lib/python2.6/site-
packages/sage/matrix/matrix2.so in sage.matrix.matrix2.Matrix.echelon_form
(sage/matrix/matrix2.c:27633)()
/home/vbraun/Sage/sage/local/lib/python2.6/site-
packages/sage/matrix/matrix2.so in sage.matrix.matrix2.Matrix.echelonize
(sage/matrix/matrix2.c:27292)()
/home/vbraun/Sage/sage/local/lib/python2.6/site-
packages/sage/matrix/matrix2.so in
sage.matrix.matrix2.Matrix._echelonize_ring
(sage/matrix/matrix2.c:26560)()
TypeError: Cannot convert tuple to sage.matrix.matrix2.Matrix
}}}
'''Appy''':
1. [attachment:trac_11558_echelon_form_with_transformation.patch]
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11558#comment:6>
Sage <http://www.sagemath.org>
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