#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):
About plotting in general: There is `element_labels` but `vertex_size`.
Plotting poset is not fully "poset-aware". There are options that don't
make sense, something like `xaxis`.
About not ranked posets, an idea: Let us define `grank` for connected
poset. First find (some) longest chain of poset and let it's elements have
granks 0, 1, 2.... Now define grank of other elements so that they are
average of distances to elements of the longest chain. If for example
there is "side-chain" of element a and b from longesth paht grank element
2 to longest path grank element 6, then a will have grank ((2+1)+(6-2))/2
and b will have grank ((2+2)+(6-1))/2. And now set vertical position of
elements according to grank.
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Ticket URL: <http://trac.sagemath.org/ticket/18936#comment:4>
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