#18936: Poset plot won't accept heights argument if poset is ranked
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Reporter: robharron | Owner:
Type: defect | Status: new
Priority: minor | Milestone: sage-6.8
Component: combinatorics | Resolution:
Keywords: Poset, plot | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by jmantysalo):
Replying to [comment:5 robharron]:
> gives a plot where the arrow from 0 to 4 goes through 2 and the arrow
from 2 to 5 goes through 4, so it looks like 0<2<4<5. Is there a way to
get it to plot this better?
AFAIK there is no good solution. There is some paper about drawing
lattices, but Sage draws them just like all posets. And I have seen same
problem, at least on
https://groups.google.com/forum/#!search/Poset.show%28%29$20and$20symmetry
/sage-support/-FGCEL0MJag/WZLONmtbBt0J I asked about something similar.
I think that in general this is a hard problem. However, it should not be
that hard to at least try arranging elements on same level to minimize
this problem.
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Ticket URL: <http://trac.sagemath.org/ticket/18936#comment:6>
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