# 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 offset clipped).

## Implementation

## Related Issues

#1730, #1603, #2203, #2133

## Backward compatibility

## Alternatives