MEP24: negative radius in polar plots

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Status

*Discussion*

Branches and Pull requests

None

Abstract

It is clear that polar plots need to be able to gracefully handle

negative r values (not by clipping or reflection).

Detailed description

One obvious application that we should support is bB plots (see

https://github.com/matplotlib/matplotlib/issues/1730#issuecomment-40815837),

but this seems more generally useful (for example growth rate as a

function of angle). The assumption in the current code (as I

understand it) is that the center of the graph is `r==0`, however it

would be good to be able to set the center to be at any `r` (with any

value less than the off set clipped).

Implementation

Related Issues

#1730, #1603, #2203, #2133

Backward compatibility

Alternatives