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Restore PolarTransform(apply_theta_transforms) parameter #31630

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Merged
rcomer merged 1 commit into from
May 8, 2026
Merged

Restore PolarTransform(apply_theta_transforms) parameter #31630

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10 changes: 10 additions & 0 deletions doc/api/next_api_changes/deprecations/31630-ES.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,10 @@
``apply_theta_transforms`` option in ``PolarTransform``
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Applying theta transforms in `~matplotlib.projections.polar.PolarTransform` and
`~matplotlib.projections.polar.InvertedPolarTransform` has been removed, and the
*apply_theta_transforms* keyword argument is deprecated for both classes.

If you need to retain the behaviour where theta values are transformed, chain the
``PolarTransform`` with a `~matplotlib.transforms.Affine2D` transform that performs the
theta shift and/or sign shift.
10 changes: 0 additions & 10 deletions doc/api/next_api_changes/removals/30004-DS.rst
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8 changes: 6 additions & 2 deletions lib/matplotlib/projections/polar.py
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Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,9 @@ class PolarTransform(mtransforms.Transform):

input_dims = output_dims = 2

def __init__(self, axis=None, use_rmin=True, *, scale_transform=None):
@_api.delete_parameter('3.11', 'apply_theta_transforms')
def __init__(self, axis=None, use_rmin=True, *,
apply_theta_transforms=False, scale_transform=None):
"""
Parameters
----------
Expand Down Expand Up @@ -183,7 +185,9 @@ class InvertedPolarTransform(mtransforms.Transform):
"""
input_dims = output_dims = 2

def __init__(self, axis=None, use_rmin=True):
@_api.delete_parameter('3.11', 'apply_theta_transforms')
def __init__(self, axis=None, use_rmin=True,
*, apply_theta_transforms=False):
"""
Parameters
----------
Expand Down
3 changes: 3 additions & 0 deletions lib/matplotlib/projections/polar.pyi
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Expand Up @@ -18,6 +18,7 @@ class PolarTransform(mtransforms.Transform):
axis: PolarAxes | None = ...,
use_rmin: bool = ...,
*,
apply_theta_transforms: bool = ...,
scale_transform: mtransforms.Transform | None = ...,
) -> None: ...
def inverted(self) -> InvertedPolarTransform: ...
Expand All @@ -34,6 +35,8 @@ class InvertedPolarTransform(mtransforms.Transform):
self,
axis: PolarAxes | None = ...,
use_rmin: bool = ...,
*,
apply_theta_transforms: bool = ...,
) -> None: ...
def inverted(self) -> PolarTransform: ...

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