python - matplotlib:在忽略缺失数据的点之间画线

Question

我有一组数据，我想将其绘制为折线图。对于每个系列，都缺少一些数据(但每个系列都不同)。目前 matplotlib 不绘制跳过缺失数据的线条:例如

import matplotlib.pyplot as plt

xs = range(8)
series1 = [1, 3, 3, None, None, 5, 8, 9]
series2 = [2, None, 5, None, 4, None, 3, 2]

plt.plot(xs, series1, linestyle='-', marker='o')
plt.plot(xs, series2, linestyle='-', marker='o')

plt.show()

导致绘图中的线条有间隙。如何告诉 matplotlib 通过间隙画线？ (我宁愿不必插入数据)。

Answer 1

您可以通过这种方式屏蔽 NaN 值:

import numpy as np
import matplotlib.pyplot as plt

xs = np.arange(8)
series1 = np.array([1, 3, 3, None, None, 5, 8, 9]).astype(np.double)
s1mask = np.isfinite(series1)
series2 = np.array([2, None, 5, None, 4, None, 3, 2]).astype(np.double)
s2mask = np.isfinite(series2)

plt.plot(xs[s1mask], series1[s1mask], linestyle='-', marker='o')
plt.plot(xs[s2mask], series2[s2mask], linestyle='-', marker='o')

plt.show()

这导致