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Plt.eventplot refuses linear calculations

This should be fairly easy to reproduce:

plt.eventplot(positions=[1, 2, 3], lineoffsets=[1, 2, 3])

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ValueError: lineoffsets and positions are unequal sized sequences

For reasons that I cannot understand, because they clearly are not.

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If I understand correctly, you want to plot 3 lines at different starting heights (offsets). The way it works with plt.eventplot

is as follows:

import numpy as np
import matplotlib.pyplot as plt

positions = np.array([1, 2, 3])[:,np.newaxis]   # or np.array([[1], [2], [3]])
offsets = [1,2,3]

plt.eventplot(positions, lineoffsets=offsets)
plt.show()


You must set an offset for each group of data you want to plot. In your case, you need to split the list into a 3D array (a shape (m,n)

with the m

number of datasets and the n

number of data points in the dataset). Thus, plt.eventplot

knows that he must use different offsets for each data group. Also see this example.

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