#10541: Conversions of vectors to matrices
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Reporter: rbeezer | Owner: jason, was
Type: enhancement | Status: needs_review
Priority: minor | Milestone: sage-4.6.2
Component: linear algebra | Keywords:
Author: Rob Beezer | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by newvalueoldvalue):
* status: new => needs_review
* author: => Rob Beezer
Old description:
> A vector is naturally a single-row matrix or a single-column matrix.
> There is an implicit assumption in Sage that the former is more
> desirable. These patches aim to put the two options on even footing,
> while also making the conversion of the type perhaps more obvious.
>
> One patch: implements .row() and .column() for vectors, as suggested by
> Jason Grout. There is a nice symmetry with the commands .row(i) and
> .column(i) for matrices, see the doctests.
>
> Another patch: deprecates .transpose() which presumes rows are preferable
> and has its functionality exactly duplicated by .column()
New description:
A vector is naturally a single-row matrix or a single-column matrix.
There is an implicit assumption in Sage that the former is more desirable.
These patches aim to put the two options on even footing, while also
making the conversion of the type perhaps more obvious.
First patch: implements .row() and .column() for vectors, as suggested by
Jason Grout. There is a nice symmetry with the commands .row(i) and
.column(i) for matrices, see the doctests. Also allows sparseness to be
preserved.
Second patch: deprecates .transpose() which presumes rows are preferable
and has its functionality exactly duplicated by .column(). Called once in
a number field doctest, apparently for purely cosmetic reasons. Called
once in polyhedra code, presumably in an outer product (which should also
be a new method for vectors). Details on this in a comment.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10541#comment:1>
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