Numerical noise in graph.py get_pos() and graph_plot.py #5302
Description
On Fedora 9 and 10, 32 bits:
sage -t "devel/sage/sage/graphs/graph.py"
**********************************************************************
File "/home/jaap/downloads/sage-3.3.alpha1/devel/sage/sage/graphs/graph.py", line 5814:
sage: G.get_pos()
Expected:
{0: [-0.81..., -0.32...],
1: [-0.49..., 0.53...],
2: [0.04..., 0.96...],
3: [0.00..., 0.01...],
4: [0.17..., -0.71...],
5: [-0.47..., 0.06...],
6: [0.35..., -0.17...],
7: [0.54..., 0.50...],
8: [-0.30..., -0.57...],
9: [0.95..., -0.28...]}
Got:
{0: [-0.80999357280480733, -0.35674303178095085], 1: [-0.5137985651989595, 0.53516030613479626], 2: [0.04267232662930763, 0.9733718008664739], 3: [-0.0030625205151234456, 0.025523074413981252], 4: [0.20666820211352116, -0.73775138260652107], 5: [-0.48704143554494495, 0.075148546351255105], 6: [0.35418721150812299, -0.17351758872721781], 7: [0.54564695734576318, 0.51479808833141838], 8: [-0.29589999259318039, -0.57812915207589943], 9: [0.96062138906029881, -0.27786066090733674]}
**********************************************************************
1 items had failures:
1 of 78 in __main__.example_133
***Test Failed*** 1 failures.
sage -t "devel/sage/sage/graphs/graph_plot.py"
**********************************************************************
File "/home/jaap/downloads/sage-3.3.alpha1/devel/sage/sage/graphs/graph_plot.py", line 108:
sage: g.get_pos()
Expected:
{0: [6.123233995736766e-17, 1.0],
1: [-0.95105651629515353, 0.30901699437494751],
2: [-0.58778525229247325, -0.80901699437494734],
3: [0.58778525229247292, -0.80901699437494756],
4: [0.95105651629515364, 0.30901699437494717]}
Got:
{0: [6.1230317691118863e-17, 1.0], 1: [-0.95105651629515353, 0.30901699437494751], 2: [-0.58778525229247325, -0.80901699437494734], 3: [0.58778525229247292, -0.80901699437494756], 4: [0.95105651629515364, 0.30901699437494717]}
**********************************************************************
1 items had failures:
1 of 8 in __main__.example_2
***Test Failed*** 1 failures.
For whitespace errors, see the file /home/jaap/downloads/sage-3.3.alpha1/tmp/.doctest_graph_plot.py
[28.9 s]
Jaap
Component: graph theory
Issue created by migration from https://trac.sagemath.org/ticket/5302