#16907: Adding two region plots yields surprising results
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Reporter: | Owner:
kcrisman | Status: needs_review
Type: | Milestone: sage-6.7
defect | Resolution:
Priority: major | Merged in:
Component: | Reviewers:
graphics | Work issues:
Keywords: | Commit:
Authors: Yuan | c0770dc34e8482eb5d1c04338820e361a2a4cb4b
Zhou | Stopgaps:
Report Upstream: N/A |
Branch: |
u/yzh/region_plot |
Dependencies: |
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Comment (by yzh):
Replying to [comment:4 kcrisman]:
> Interesting fix! Do you think the change in the "endpoints" for the
contours will make a big difference? Thanks for the contribution, I'll
put this on my list for things to review once the semester is over.
Do you mean the change of `contours` from `[-1e307, 0, 1e307]` to
`[-1e-20, 0, 1e-20]`?
Yes, I think setting `contours=[-1e307, 0, 1e307]` was not a good idea. I
tried
{{{
sage: x,y = var('x,y')
sage: region_plot(x^2+y^2 < 1, (x, -1, 1), (y, -1, 1), incol='blue',
outcol='red',alpha=0.5)
}}}
with setting `contours=[-0.2, 0, 0.2]`, and figured out that the meaning
of the "endpoints" was quite different from what I had imagined.
--
Ticket URL: <http://trac.sagemath.org/ticket/16907#comment:5>
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