Add a second x-axis to this Axes
.
For example if we want to have a second scale for the data plotted on the xaxis.
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).
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 Secondary Axis for examples of making these conversions.
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.
Added in version 3.9.
Axes
properties.
Other miscellaneous Axes parameters.
Warning
This method is experimental as of 3.1, and the API may change.
Examples
The main axis shows frequency, and the secondary axis shows period.
(Source code
, 2x.png
, png
)
To add a secondary axis relative to your data, you can pass a transform to the new axis.
(Source code
, 2x.png
, png
)
matplotlib.axes.Axes.secondary_xaxis
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