使用pyplot在python中的多个子图上绘制水平线 [英] Plotting a horizontal line on multiple subplots in python using pyplot

问题描述

我正在同一页面上绘制三个子图.我想在所有子图中绘制一条水平线.以下是我的代码和生成的图形:(您会注意到我可以在其中一个图上获得水平线，但不是全部)

I am plotting three subplots on the same page. I want to draw a horiZontal line through all the subplots. Following is my code and the resultant graph: (You can notice I can get the horizontal line on one of the plots, but not all)

gs1 = gridspec.GridSpec(8, 2)
gs1.update(left=0.12, right=.94, wspace=0.12)
ax1 = plt.subplot(gs1[0:2, :])
ax2 = plt.subplot(gs1[3:5, :], sharey=ax1)
ax3 = plt.subplot(gs1[6:8, :], sharey=ax1)

ax1.scatter(theta_cord, density, c = 'r', marker= '1')
ax2.scatter(phi_cord, density, c = 'r', marker= '1')
ax3.scatter(r_cord, density, c = 'r', marker= '1')
ax1.set_xlabel('Theta (radians)')
ax1.set_ylabel('Galaxy count')
ax2.set_xlabel('Phi (radians)')
ax2.set_ylabel('Galaxy count')
ax3.set_xlabel('Distance (Mpc)')
ax3.set_ylabel('Galaxy count')
plt.ylim((0,0.004))
loc = plticker.MultipleLocator(base=0.001)
ax1.yaxis.set_major_locator(loc)

plt.axhline(y=0.002, xmin=0, xmax=1, hold=None)

plt.show()

这将生成以下内容:

This generates the following:

同样，我也希望我在最后一个子图上绘制的线也出现在前两个子图上.我该怎么办?

Again, I want the line I drew on the last subplot to appear on the first two subplots too. How do I do that?

推荐答案

我找到了一种方法，供那些偶然发现此问题的人使用.

I found a way to do it for anyone who stumbles on this anyways.

我们需要替换OP中的以下行:

We need to replace the following line from the OP:

plt.axhline(y=0.002, xmin=0, xmax=1, hold=None)

我们将其替换为:

ax1.axhline(y=0.002,xmin=0,xmax=3,c="blue",linewidth=0.5,zorder=0)
ax2.axhline(y=0.002,xmin=0,xmax=3,c="blue",linewidth=0.5,zorder=0)
ax3.axhline(y=0.002,xmin=0,xmax=3,c="blue",linewidth=0.5,zorder=0)

这将产生:

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