[英]plot multiple arrows between scatter points - Matplotlib
我正在尝试在两组散点之间绘制多个箭头。 使用ax.plot
绘制一条线很容易。 但我试图实现一个箭头而不是一条线。 箭头似乎没有在点之间对齐。
所以如果线图在下面初始化,它工作正常。 但是箭袋图不会单独绘制相同的线条。
import pandas as pd
import matplotlib.pyplot as plt
import numpy as np
df = pd.DataFrame(np.random.randint(-50,50,size=(100, 4)), columns=list('ABCD'))
fig, ax = plt.subplots()
x1 = df['A']
y1 = df['B']
x2 = df['C']
y2 = df['D']
AB = plt.scatter(x1, y1, c = 'blue', marker = 'o', s = 10, zorder = 3)
CD = plt.scatter(x2, y2, c = 'red', marker = 'o', s = 10, zorder = 2)
# plot line between points
#ax.plot([x1,x2],[y1,y2], color = 'black', linestyle = '--', linewidth = 0.5)
ax.quiver([x1, x2], [y1, y2])
根据文档,请参阅scale_units
选项,您需要: angles='xy', scale_units='xy', scale=1
in quiver
:
AB = ax.scatter(x1, y1, c = 'blue', marker = 'o', s = 10, zorder = 3)
CD = ax.scatter(x2, y2, c = 'red', marker = 'o', s = 10, zorder = 2)
ax.quiver(x1, y1, (x2-x1), (y2-y1), angles='xy', scale_units='xy', scale=1)
plt.show()
输出:
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