matplotlib多子图实现共享坐标轴的示例详解

import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(-5,5,100)
ys = [np.sin(x+i) for i in range(5)]

fig,axes = plt.subplots(2,2,sharex=True, sharey=True)

axes = axes.reshape(-1)
for i in range(4):
    axes[i].plot(x, ys[i])

plt.show()

fig = plt.figure()
ax3 = fig.add_subplot(223)
ax3.plot(x,ys[2])

ax1 = fig.add_subplot(221, sharex=ax3)
ax1.plot(x[:50],ys[0][:50])

ax4 = fig.add_subplot(224, sharey=ax3)
ax4.plot(x[50:],ys[3][50:])

ax2 = fig.add_subplot(222, sharex=ax4, sharey=ax1)
ax2.plot(x,ys[1])

plt.show()

fig = plt.figure()
ax3 = fig.add_subplot(223)
ax3.plot(x,ys[2])

ax1 = fig.add_subplot(221, sharex=ax3)
ax1.plot(x[:50],ys[0][:50])
ax1.tick_params(axis="x", labelbottom=False)

ax4 = fig.add_subplot(224, sharey=ax3)
ax4.plot(x[50:],ys[3][50:])
ax4.tick_params(axis="y", labelleft=False)

ax2 = fig.add_subplot(222, sharex=ax4, sharey=ax1)
ax2.plot(x,ys[1])
ax2.tick_params(axis="x", labelbottom=False)
ax2.tick_params(axis="y", labelleft=False)

plt.show()

path = r'lena.jpg'
img = plt.imread(path)

xs = [np.sum(img[:,:,i],0) for i in range(3)]
ys = [np.sum(img[:,:,i],1) for i in range(3)]

fig = plt.figure()
gs = fig.add_gridspec(2, 2,
    width_ratios=(4, 1),
    height_ratios=(1, 4))

ax = fig.add_subplot(gs[1, 0])
ax.imshow(img)        # 散点图绘制
plt.axis('off')

xHist = fig.add_subplot(gs[0, 0], sharex=ax)
xHist.tick_params(axis="x", labelbottom=False)

yHist = fig.add_subplot(gs[1, 1], sharey=ax)
yHist.tick_params(axis="y", labelleft=False)

colors = 'rgb'
for i in range(3):
    xHist.plot(xs[i], color=colors[i])
    yHist.plot(ys[i], np.arange(len(ys[i])),color=colors[i])

plt.show()