#14757: Poset's show() method applied to an antichain gives bad picture
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Reporter: darij | Owner: sage-combinat
Type: defect | Status: positive_review
Priority: major | Milestone: sage-5.11
Component: combinatorics | Resolution:
Keywords: combinat, poset, days49 | Work issues:
Report Upstream: N/A | Reviewers: Travis Scrimshaw
Authors: Darij Grinberg | Merged in:
Dependencies: | Stopgaps:
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Changes (by {'newvalue': u'Darij Grinberg', 'oldvalue': u'Travis Scrimshaw,
Darij Grinberg'}):
* status: needs_review => positive_review
* author: Travis Scrimshaw, Darij Grinberg => Darij Grinberg
* cc: ncohen (added)
* keywords: combinat, poset => combinat, poset, days49
* reviewer: => Travis Scrimshaw
Old description:
> {{{
> sage: Poset({1: [], 2: [], 3: []}).show()
> }}}
>
> It shows all three elements as the same point. I suspect this hails from
> the {{{plot}}} method on Poset, since a digraph with no edges shows fine.
>
> In the docstring of the {{{plot}}} method on Poset, there's also a typo:
> {{{empy}}}.
>
> * Apply: [attachment:trac_14757-acyclic_layout-dg.patch]
New description:
{{{
sage: Poset({1: [], 2: [], 3: []}).show()
}}}
It shows all three elements as the same point. I suspect this hails from
the {{{plot}}} method on Poset, since a digraph with no edges shows fine.
In the docstring of the {{{plot}}} method on Poset, there's also a typo:
{{{empy}}}.
EDIT: This one can only be reproduced without dot2tex installed, since the
methods branch depending on whether it is there or not.
* Apply: [attachment:trac_14757-acyclic_layout-dg.patch]
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14757#comment:3>
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