matplotlib-细分图中没有Twinlabel轴的xlabel和xticks [英] matplotlib - No xlabel and xticks for twinx axes in subploted figures

问题描述

我想要做的是子图中的2x2图表.然后，对于每个图形，我将使用两个y轴.因此，我为每个图使用twinx()方法.正如您在我共享的图中看到的那样，问题是它没有在第一行显示xlabel和xticks.对于第二行，一切都很好.我在图中用红色字体指定了问题(没有xlabel和xticks !!!").

What I want to do is a 2x2 diagrams in a subplot. Then, for each figure, I am going to use two y-axes. Therefore, I used twinx() method for each diagram. The problem as you see in the figure I shared is that it does not show xlabel and xticks for first row. For the second row, everything is fine. I have specified the problem in red font in the figure ("No xlabel and xticks!!!").

每个图都有自己的x轴和y轴，因此没有共享之处.

Each diagram has its own x-axis and y-axis and there is no sharing in that.

我已经对该代码进行了很多调整，并缩小了造成问题的范围.这是因为我在较高的行中使用twinx().如果我尝试移除次要y轴，则一切都会恢复正常，并且正确显示了上排的xlabel和ylabel.

I have tweaked this code a lot and narrowed down the problem maker. It is because I use twinx() in upper rows. If I try to remove the secondary y axis, everything goes back to normal and the xlabel and ylabel for upper rows are shown correctly.

我不知道出什么问题了！

I don't know what is the problem!

这是我正在处理的代码.

This is the code I am working on.

import matplotlib.pyplot as plt
import numpy as np
import pandas as pd
from io import StringIO

s = StringIO(u"""     amount     price
A     40929   4066443
B     93904   9611272
C    188349  19360005
D    248438  24335536
E    205622  18888604
F    140173  12580900
G     76243   6751731
H     36859   3418329
I     29304   2758928
J     39768   3201269
K     30350   2867059""")

df = pd.read_csv(s, index_col=0, delimiter=' ', skipinitialspace=True)

fig = plt.figure() 

ax_2 = fig.add_subplot(222, sharex=None, sharey=None) 
ax_22 = ax_2.twinx()
ax_2.plot([1, 3, 5, 7, 9])
ax_22.plot([1.0/x for x in [1, 3, 5, 7, 9]])
ax_2.set_xlabel("AX2 X Lablel")
ax_2.set_ylabel("AX2 Y Lablel")
ax_22.set_ylabel("AX2_Twin Y Lablel")


ax_2 = fig.add_subplot(223, sharex=None, sharey=None) 
ax_22 = ax_2.twinx()
ax_2.plot([100, 300, 500, 700, 900])
ax_22.plot([x*x for x in [100, 300, 500, 700, 900]])
ax_2.set_xlabel("AX3 X Lablel")
ax_2.set_ylabel("AX3 Y Lablel")
ax_22.set_ylabel("AX3_Twin Y Lablel")




ax_2 = fig.add_subplot(224, sharex=None, sharey=None) 
ax_22 = ax_2.twinx()
ax_2.set_xlabel("AX4 X Lablel")
ax_2.set_ylabel("AX4 Y Lablel")
ax_22.set_ylabel("AX4_Twin Y Lablel")






ax = fig.add_subplot(221, sharex=None, sharey=None) 
ax2 = ax.twinx() 
width = 0.4
df.amount.plot(kind='bar', color='red', ax=ax, width=width, position=1, sharex=False, sharey=False)
df.price.plot(kind='bar', color='blue', ax=ax2, width=width, position=0, sharex=False, sharey=False)

ax.set_xlabel("Alphabets")
ax.set_ylabel('Amount')
ax2.set_ylabel('Price')



plt.subplots_adjust(wspace=0.8, hspace=0.8)
plt.savefig("t1.png", dpi=300)
plt.show()

它生成下图:

已编辑

感谢您的回答.但是，在绘制图中使用熊猫时，我的问题仍然存在.我提出了一个新问题.请看看它:

Thanks for the answers. However, my problem still exists when using Pandas in plotting diagrams. I opened a new question. Please take a look at it:

matplotlib-熊猫-否细分图中的孪生轴的xlabel和xticks

推荐答案

您提供的代码似乎产生了预期的结果.

The code you provided seems to produce the desired result.

这使我认为您的控制台或matplotlib版本存在问题-也许您可以提供有关如何运行代码的更多信息.

That makes me think that there is an issue with your console or matplotlib version - perhaps you can provide more information on how you are running the code.

我建议将ax.set_xlabel移到twinx之前，例如:

I would recommend moving the ax.set_xlabel before twinx such as:

ax_2 = fig.add_subplot(222, sharex=None, sharey=None)
ax_22 = ax_2.twinx()
ax_2.set_xlabel("AX2 X Lablel")
ax_2.plot([1, 3, 5, 7, 9])

# Becomes...

ax_2 = fig.add_subplot(222, sharex=None, sharey=None)
ax_2.set_xlabel("AX2 X Lablel")
ax_2.plot([1, 3, 5, 7, 9])
ax_22 = ax_2.twinx()

编辑，我建议使用 gridspec 反而.请参见以下工作示例:

EDIT I would suggest using gridspec instead. See the below working example:

import matplotlib.pyplot as plt
import matplotlib.gridspec as gspec
import numpy as np

fig = plt.figure()
gs = gspec.GridSpec(2, 2)
gs.update(hspace=0.7, wspace=0.7)
ax1 = plt.subplot(gs[0, 0])
ax2 = plt.subplot(gs[1, 0])
ax3 = plt.subplot(gs[0, 1])
ax4 = plt.subplot(gs[1, 1])


x1 = np.linspace(1,10,10)

ax1.plot(x1, x1**2)
ax1.set_xlabel('ax1 x')
ax1_2 = ax1.twinx()
ax1_2.plot(x1, x1**3)
ax1_2.set_ylabel('ax1_2 y')
ax1.set_ylabel('ax1 y')

# To save time I left the other cells blank, but it should work fine.

plt.show()

上面产生了这个:

这篇关于matplotlib-细分图中没有Twinlabel轴的xlabel和xticks的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！