#9744: implicit_plot fill option fills entire plot
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Reporter: jason | Owner: jason, was
Type: defect | Status: needs_review
Priority: critical | Milestone: sage-5.0
Component: graphics | Keywords:
Work_issues: fix lambda functions with fill | Upstream: N/A
Reviewer: Karl-Dieter Crisman | Author: Jason Grout,
Michael Boratko, Benjamin Jones
Merged: | Dependencies:
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Changes (by newvalueoldvalue):
* status: needs_work => needs_review
* reviewer: Benjamin Jones, Karl-Dieter Crisman => Karl-Dieter Crisman
* author: Jason Grout, Michael Boratko => Jason Grout, Michael Boratko,
Benjamin Jones
Comment:
I uploaded [attachment:trac_9744_v2.patch] which solves the main problem
by calling `region_plot(lambda x,y: f(x,y)<0, ...)` instead of
`region_plot(f<0, ...)`
...but it introduces a strange artefact. Try the following (this doesn't
require applying the patch).
{{{
sage: region_plot(x^2+y^2-2<0, (x,-3,3), (y,-3,3))
# looks normal
sage: region_plot(lambda x,y: x^2+y^2-2<0, (x,-3,3), (y,-3,3))
# looks ragged around the edges
sage: region_plot(lambda x,y: x^2+y^2-2<0, (x,-3,3), (y,-3,3),
plot_points=200)
# better, but not great
sage: region_plot(lambda x,y: x^2+y^2-2<0, (x,-3,3), (y,-3,3),
plot_points=500)
# looks about like the original, but takes a long time.
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9744#comment:10>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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