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"""
=============
Inverted axis
=============
This example demonstrates two ways to invert the direction of an axis:
- If you want to set *explicit axis limits* anyway, e.g. via `~.Axes.set_xlim`, you
can swap the limit values: ``set_xlim(4, 0)`` instead of ``set_xlim(0, 4)``.
- Use `.Axis.set_inverted` if you only want to invert the axis *without modifying
the limits*, i.e. keep existing limits or existing autoscaling behavior.
"""
import matplotlib.pyplot as plt
import numpy as np
x = np.arange(0.01, 4.0, 0.01)
y = np.exp(-x)
fig, (ax1, ax2) = plt.subplots(1, 2, figsize=(6.4, 4), layout="constrained")
fig.suptitle('Inverted axis with ...')
ax1.plot(x, y)
ax1.set_xlim(4, 0) # inverted fixed limits
ax1.set_title('fixed limits: set_xlim(4, 0)')
ax1.set_xlabel('decreasing x ⟶')
ax1.grid(True)
ax2.plot(x, y)
ax2.xaxis.set_inverted(True) # inverted axis with autoscaling
ax2.set_title('autoscaling: set_inverted(True)')
ax2.set_xlabel('decreasing x ⟶')
ax2.grid(True)
plt.show()
# %%
# .. tags::
#
# component: axis
# plot-type: line
# level: beginner
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