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Add U, V and C setter to Quiver #26410

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Add U, V and C setter to Quiver #26410

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b268585
Add `set_U`, `set_V` and `set_C` method to `matplotlib.quiver.Quiver`
ericpre Jul 29, 2023
10adf0b
Add `set_offsets` to `quiver` and make the attribute (`N` and `XY`) p…
ericpre Sep 5, 2023
92848b2
Add release note
ericpre Sep 6, 2023
e5b42b1
Add `set_XYUVC` method to be used for all quiver setter
ericpre Mar 23, 2024
c8d4924
Privatise `quiver.Quiver.Umask`
ericpre Mar 23, 2024
aba8d9b
Fix typing
ericpre Mar 23, 2024
9b5bc95
Don't check length of arguments in quiver collection and increase cov…
ericpre Mar 26, 2024
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36 changes: 36 additions & 0 deletions doc/users/next_whats_new/add_Quiver_setters.rst
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Add ``U``, ``V`` and ``C`` setter to ``Quiver``
-----------------------------------------------

The ``U``, ``V`` and ``C`` values of the `~matplotlib.quiver.Quiver`
can now be changed after the collection has been created.

.. plot::
:include-source: true

import matplotlib.pyplot as plt
from matplotlib.quiver import Quiver
import numpy as np

fig, ax = plt.subplots()
X = np.arange(-10, 10, 1)
Y = np.arange(-10, 10, 1)
U, V = np.meshgrid(X, Y)
C = np.hypot(U, V)
# When X and Y are 1D and U, V are 2D, X, Y are expanded to 2D
# using X, Y = np.meshgrid(X, Y)
qc = ax.quiver(X, Y, U, V, C)

qc.set_U(U/5)

# The number of arrows can also be changed.

# Get new X, Y, U, V, C
X = np.arange(-10, 10, 2)
Y = np.arange(-10, 10, 2)
U, V = np.meshgrid(X, Y)
C = np.hypot(U, V)
# Use 2D X, Y coordinate (X, Y will not be expanded to 2D)
X, Y = np.meshgrid(X, Y)

# Set new values
qc.set_XYUVC(X, Y, U, V, C)
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