refer to: https://matplotlib.org/stable/gallery/lines_bars_and_markers/step_demo.html#sphx-glr-gallery-lines-bars-and-markers-step-demo-py

Step Demo

This example demonstrates the use of pyplot.step for piece-wise constant curves. In particular, it illustrates the effect of the parameter whereon the step position.

Note

For the common case that you know the edge positions, use pyplot.stairsinstead.

The circular markers created with pyplot.plot show the actual data positions so that it's easier to see the effect of where.

import numpy as npimport matplotlib.pyplot as pltx = np.arange(14)y = np.sin(x / 2)plt.step(x, y + 2, label='pre (default)')plt.plot(x, y + 2, 'o--', color='grey', alpha=0.3)plt.step(x, y + 1, where='mid', label='mid')plt.plot(x, y + 1, 'o--', color='grey', alpha=0.3)plt.step(x, y, where='post', label='post')plt.plot(x, y, 'o--', color='grey', alpha=0.3)plt.grid(axis='x', color='0.95')plt.legend(title='Parameter where:')plt.title('plt.step(where=...)')plt.show()

The same behavior can be achieved by using the drawstyle parameter ofpyplot.plot.

plt.plot(x, y + 2, drawstyle='steps', label='steps (=steps-pre)')plt.plot(x, y + 2, 'o--', color='grey', alpha=0.3)plt.plot(x, y + 1, drawstyle='steps-mid', label='steps-mid')plt.plot(x, y + 1, 'o--', color='grey', alpha=0.3)plt.plot(x, y, drawstyle='steps-post', label='steps-post')plt.plot(x, y, 'o--', color='grey', alpha=0.3)plt.grid(axis='x', color='0.95')plt.legend(title='Parameter drawstyle:')plt.title('plt.plot(drawstyle=...)')plt.show()

References

The use of the following functions, methods, classes and modules is shown in this example:

• matplotlib.axes.Axes.step / matplotlib.pyplot.step

• matplotlib.axes.Axes.plot / matplotlib.pyplot.plot