matplotlib - 我如何适合长标题？

Question

有一个类似的问题- 但我无法使那里提出的解决方案起作用。

这是一个带有长标题的示例图：

#!/usr/bin/env python

import matplotlib
import matplotlib.pyplot
import textwrap

x = [1,2,3]
y = [4,5,6]

# initialization:
fig = matplotlib.pyplot.figure(figsize=(8.0, 5.0)) 

# lines:
fig.add_subplot(111).plot(x, y)

# title:
myTitle = "Some really really long long long title I really really need - and just can't - just can't - make it any - simply any - shorter - at all."

fig.add_subplot(111).set_title("\n".join(textwrap.wrap(myTitle, 80)))

# tight:
(matplotlib.pyplot).tight_layout()

# saving:
fig.savefig("fig.png")

它给出了一个

 AttributeError: 'module' object has no attribute 'tight_layout'

如果我用它替换(matplotlib.pyplot).tight_layout()它fig.tight_layout()会给出：

 AttributeError: 'Figure' object has no attribute 'tight_layout'

所以我的问题是 - 我如何使标题适合情节？

Answer 1

这是我最终使用的：

#!/usr/bin/env python3

import matplotlib
from matplotlib import pyplot as plt
from textwrap import wrap

data = range(5)

fig = plt.figure()
ax = fig.add_subplot(111)

ax.plot(data, data)

title = ax.set_title("\n".join(wrap("Some really really long long long title I really really need - and just can't - just can't - make it any - simply any - shorter - at all.", 60)))

fig.tight_layout()
title.set_y(1.05)
fig.subplots_adjust(top=0.8)

fig.savefig("1.png")

Answer 2

一种方法是简单地更改标题的字体大小：

import pylab as plt

plt.rcParams["axes.titlesize"] = 8

myTitle = "Some really really long long long title I really really need - and just can't - just can't - make it any - simply any - shorter - at all."
plt.title(myTitle)
plt.show()

在您链接的答案中，还有其他几个涉及添加换行符的好解决方案。甚至还有一个自动解决方案可以根据图形调整大小！

Answer 3

• matplotlib：自动换行文本是matplotlib3.1.2 版文档的官方答案
• matplotlib：文本属性和布局也很有用
• 由于GitHub，在 Jupyter 中显示内联图不起作用： Text wrapping doesn't seem to work in jupyter notebook #10869 unless you do this answer Matplotlib and Ipython-notebook: Displaying exactly the figure that will be saved
  • plt.savefig(...)似乎可以正常工作wrap

import matplotlib.pyplot as plt

x = [1,2,3]
y = [4,5,6]

# initialization:
fig, axes = plt.subplots(figsize=(8.0, 5.0))

# title:
myTitle = "Some really really long long long title I really really need - and just can't - just can't - make it any - simply any - shorter - at all."

# lines:
axes.plot(x, y)

# set title
axes.set_title(myTitle, loc='center', wrap=True)

plt.show()

• 以下也有效

plt.figure(figsize=(8, 5))

# title:
myTitle = "Some really really long long long title I really really need - and just can't - just can't - make it any - simply any - shorter - at all."

# lines:
plt.plot(x, y)

# set title
plt.title(myTitle, loc='center', wrap=True)

plt.show()

笔记

• 不推荐使用以下添加轴的方式

# lines:
fig.add_subplot(111).plot(x, y)

# title:
myTitle = "Some really really long long long title I really really need - and just can't - just can't - make it any - simply any - shorter - at all."

fig.add_subplot(111).set_title(myTitle, loc='center', wrap=True)

MatplotlibDeprecationWarning: Adding an axes using the same arguments as a previous axes currently reuses the earlier instance. In a future version, a new instance will always be created and returned. Meanwhile, this warning can be suppressed, and the future behavior ensured, by passing a unique label to each axes instance.

Answer 4

我更喜欢以这种方式调整@Adobe的解决方案：

plt.title("First Title\n%s" % "\n".join(wrap("Second Title", width=60)))

Answer 5

添加\n你的文本标题

前

axs[0, 0].set_title('pure imshow of 2D-array (RGB)')
axs[0, 1].set_title('Mean filter')                                     # imshow by default applies a standard colormap,  viridis cmap, which is greenish. 
axs[0, 2].set_title('pure imshow of 2D-array (R-channel)')             # 
axs[1, 0].set_title('imshow of 2D-array with R values cmap="Grey_r"')
axs[1, 1].set_title('imshow of 2D-array with R values cmap="Reds_r"')
axs[1, 2].set_title('imshow of 3D-array with coordinates 1 and 2 \n(i.e.: channels G and B) set to 0')

后

axs[1, 0].set_title('imshow of 2D-array \n with R values cmap="Grey_r"')
axs[1, 1].set_title('imshow of 2D-array \n with R values cmap="Reds_r"')
axs[1, 2].set_title('imshow of 3D-array with coordinates 1 and 2 \n channels G and B) set to 0')