#14741: Fix implicit_plot() so that we can save PDF's
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Reporter: zimmerma | Owner: jason, was
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.11
Component: graphics | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Changes (by john_perry):
* status: new => needs_review
Old description:
> In Sage 5.9:
> {{{
> sage: f = lambda x, y : (abs(cos((x + I * y) ** 4)) - 1)
> sage: g2 = implicit_plot(f,(-4, 4),(-3, 3),linewidth=0.6)
> sage: g2.save('/tmp/cosz4_2.pdf')
> TypeError: Don't know a PDF representation for <type
> 'sage.rings.real_mpfr.RealLiteral'> objects.
> }}}
> See also #13732.
New description:
In Sage 5.9:
{{{
sage: f = lambda x, y : (abs(cos((x + I * y) ** 4)) - 1)
sage: g2 = implicit_plot(f,(-4, 4),(-3, 3),linewidth=0.6)
sage: g2.save('/tmp/cosz4_2.pdf')
TypeError: Don't know a PDF representation for <type
'sage.rings.real_mpfr.RealLiteral'> objects.
}}}
See also #13732.
'''Apply''':
1.
[attachment:trac_14741_graphics_primitive_options_for_matplotlib.patch]
--
Comment:
Near as I can tell, the best solution is to add a `set_options` method to
the `GraphicPrimitive` class, then modify the `matplotlib` function to
ensure the options have type `float`, rather than `RealLiteral`. This
keeps the patch short, clean, and simple. I added corresponding doctests,
which test fine for me. This fixes the bug on my machine.
I suspect we should be able to remove all the hacks being used in other
files to convert options to `float` (e.g., `circle`, `disc`, `line`, ...).
That is not part of this patch, though I could add another patch to do so,
if desirable.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14741#comment:6>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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