Filled plot in matplotlib

Question

I have a set of points like this:

x_axis = np.arange(0, 100)

and

y_axis = np.zeros(100)
y_axis[17 : 23] = 1.

Now, I am plotting this data with the following code:

plt.figure(figsize=(50,1))
plt.fill_between(x_axis, 0, y_axis, color='blue', alpha=.25)

But I am getting the following image:

As the fill_between expects corner of a polygon this is expected. I want to plot a filled square between 17 to 23. How do I achieve this instead of a trapezium?

Tim Maier · Accepted Answer · 2020-01-25 18:40:46Z

1

Is step argument helping you ? You can set it to "pre" or "post".

plt.fill_between(x_axis, 0, y_axis, color='blue', alpha=.25, step="pre")

answered Jan 25, 2020 at 18:40

Tim Maier

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