Python matplotlib 中的图形和坐标轴方法
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Figure and axes methods in matplotlib
提问by Amelio Vazquez-Reina
Say I have the following setup:
假设我有以下设置：
import matplotlib.pyplot as plt
import numpy as np
x = np.arange(5)
y = np.exp(x)
fig1 = plt.figure()
ax1 = fig1.add_subplot(111)
ax1.plot(x, y)
I would like to add a title to the plot (or to the subplot).
我想为情节（或子情节）添加标题。
I tried:
我试过：
> fig1.title('foo')
AttributeError: 'Figure' object has no attribute 'title'
and
和
> ax1.title('foo')
TypeError: 'Text' object is not callable
How can I use the object-oriented programming interface to matplotlib to set these attributes?
如何使用面向对象的编程接口到 matplotlib 来设置这些属性？
More generally, where can I find the hierarchy of classes in matplotlib and their corresponding methods?
更一般地说，我在哪里可以找到 matplotlib 中类的层次结构及其相应的方法？
采纳答案by zhangxaochen
use ax1.set_title('foo')instead
使用ax1.set_title('foo')替代
ax1.titlereturns a matplotlib.text.Textobject:
ax1.title返回一个matplotlib.text.Text对象：
In [289]: ax1.set_title('foo')
Out[289]: <matplotlib.text.Text at 0x939cdb0>
In [290]: print ax1.title
Text(0.5,1,'foo')
You can also add a centered title to the figure when there are multiple AxesSubplot:
当有多个时，您还可以为图形添加居中标题AxesSubplot：
In [152]: fig, ax=plt.subplots(1, 2)
...: fig.suptitle('title of subplots')
Out[152]: <matplotlib.text.Text at 0x94cf650>
