#16449: Add plot() and show() methods to abstract Matroid class
-------------------------------------+-------------------------------------
Reporter: Jayant | Owner:
Type: enhancement | Status: needs_work
Priority: minor | Milestone: sage-6.3
Component: matroid theory | Resolution:
Keywords: visualization, | Merged in:
geometric representation | Reviewers:
Authors: | Work issues:
Report Upstream: N/A | Commit:
Branch: | 1a26f595814e3b7ef5b01c350858d78fd3dcf56b
u/Jayant/ticket/16449 | Stopgaps:
Dependencies: |
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Comment (by Stefan):
The white text labels are an unfortunate choice, as illustrated here:
{{{
M1 = Matroid(groundset=['Carolyn', 'Mike', 'Rudi', 'Stefan', 'Jayant',
'Dillon', 'Hassler'], field=GF(2),
reduced_matrix=[[1,1,0,1],[1,0,1,1],[0,1,1,1]])
M2 = Matroid(groundset=range(200,207), field=GF(3),
reduced_matrix=[[1,1,0,0],[1,0,1,0],[0,1,-1,0]])
M1.show()
M2.show()
}}}
The following results in an error:
{{{
M3 = matroids.Uniform(1,6)
M3.show()
}}}
{{{
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_19.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8
-*-\\n" +
_support_.preparse_worksheet_cell(base64.b64decode("TTMgPSBtYXRyb2lkcy5Vbmlmb3JtKDEsNikKTTMuc2hvdygp"),globals())+"\\n");
execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>
File
"/private/var/folders/8p/gpt0bd4x5vg46bg2j4l0mnfr0000gn/T/tmppZYy7q/___code___.py",
line 4, in <module>
exec compile(u'M3.show()
File "", line 1, in <module>
File "matroid.pyx", line 4812, in sage.matroids.matroid.Matroid.show
(sage/matroids/matroid.c:32349)
File "matroid.pyx", line 4850, in sage.matroids.matroid.Matroid.show
(sage/matroids/matroid.c:32173)
File "matroid.pyx", line 4810, in sage.matroids.matroid.Matroid.plot
(sage/matroids/matroid.c:31770)
File "/Users/stefan/sage/local/lib/python2.7/site-
packages/sage/matroids/matroids_plot_helpers.py", line 670, in geomrep
G = addlp(M1,M,L,P,pts2,G)
File "/Users/stefan/sage/local/lib/python2.7/site-
packages/sage/matroids/matroids_plot_helpers.py", line 421, in addlp
gnd = sorted(M1.groundset_list())
AttributeError: 'MinorMatroid' object has no attribute 'groundset_list'
}}}
This should result in a "NotImplementedError", but doesn't do anything:
{{{
P8 = matroids.named_matroids.P8()
P8.show()
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/16449#comment:15>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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