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Classe « Axes »

Méthode matplotlib.figure.Axes.secondary_yaxis

Signature de la méthode secondary_yaxis

def secondary_yaxis(self, location, functions=None, *, transform=None, **kwargs) 

Description

help(Axes.secondary_yaxis)

Add a second y-axis to this `~.axes.Axes`.

For example if we want to have a second scale for the data plotted on
the yaxis.


Warnings
--------
This method is experimental as of 3.1, and the API may change.

Parameters
----------
location : {'top', 'bottom', 'left', 'right'} or float
    The position to put the secondary axis.  Strings can be 'top' or
    'bottom' for orientation='x' and 'right' or 'left' for
    orientation='y'. A float indicates the relative position on the
    parent Axes to put the new Axes, 0.0 being the bottom (or left)
    and 1.0 being the top (or right).

functions : 2-tuple of func, or Transform with an inverse

    If a 2-tuple of functions, the user specifies the transform
    function and its inverse.  i.e.
    ``functions=(lambda x: 2 / x, lambda x: 2 / x)`` would be an
    reciprocal transform with a factor of 2. Both functions must accept
    numpy arrays as input.

    The user can also directly supply a subclass of
    `.transforms.Transform` so long as it has an inverse.

    See :doc:`/gallery/subplots_axes_and_figures/secondary_axis`
    for examples of making these conversions.

transform : `.Transform`, optional
    If specified, *location* will be
    placed relative to this transform (in the direction of the axis)
    rather than the parent's axis. i.e. a secondary x-axis will
    use the provided y transform and the x transform of the parent.

    .. versionadded:: 3.9

Returns
-------
ax : axes._secondary_axes.SecondaryAxis

Other Parameters
----------------
**kwargs : `~matplotlib.axes.Axes` properties.
    Other miscellaneous Axes parameters.


Examples
--------
Add a secondary Axes that converts from radians to degrees

.. plot::

    fig, ax = plt.subplots()
    ax.plot(range(1, 360, 5), range(1, 360, 5))
    ax.set_ylabel('degrees')
    secax = ax.secondary_yaxis('right', functions=(np.deg2rad,
                                                   np.rad2deg))
    secax.set_ylabel('radians')

To add a secondary axis relative to your data, you can pass a transform
to the new axis.

.. plot::

    fig, ax = plt.subplots()
    ax.plot(range(0, 5), range(-1, 4))

    # Pass 'ax.transData' as a transform to place the axis
    # relative to your data at x=3
    secax = ax.secondary_yaxis(3, transform=ax.transData)

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