1:1 aspect ratio in plot?

[Aaron Watters]

Hi folks,

I have a sequence of calculations which ends up with the equation for an ellipse.

When I plot it (or half of it) using sympy.plot it looks like a circle because the plot

automatically adjusts the aspect ratio to even out the plot.  I'd like to have a 1:1

aspect ratio.  Any automatic way to get a 1:1 aspect ratio using sympy.plot? (I know there are

ways to do it using matplotlib directly...)

You can test with a formula like x**2 + 9*y**2 = 10 or something.  It always plots

looking like a circle.

Thanks in advance!  -- Aaron Watters

[Aaron Meurer]

I guess the autoscale option will do it for you. It's documentation is
buried in the docstring of the Plot object.

Aaron Meurer

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[Stefan Krastanov]

See the docstring of the `Plot` class. It says that there is an
`aspect_ratio` aesthetics that can be modified as:

p = plot(...)
p.aspect_ratio = ...

The issue is that the our matplotlib backend does not use this yet. A
patch for this would be most welcomed. You can add it to the
`process_series` method of the `MatplotlibBackend` class on line 958
in plotting/plot.py. Something like `if parent.aspect_ratio != 'auto':
do stuff`