如何使用matplotlib显示文本? [英] How to display a text with matplotlib?

问题描述

我想这样做:

我有这个python代码:

I have this python code :

import numpy as np
import pylab as plt

a = np.array([1,2,3,4,5,6,7,8,9,10])
b = np.array([7,8,6,3,2,1,5,8,4,15])
c = plt.plot(a,b,'.')
d = 5
plt.text(2,3, "d = "+d) #This line is the problem because i have not the value of d !
plt.show()

所以实际上我只想显示d的值，但也想显示d的值，但是相对而言，例如在右下角，但不显示某些坐标.使用Python可以做到这一点吗?

So actually I just want to display the value of d and also I want to display the value of d but relatively for instance at the bottom right but not with some coordinates. Is it possible to do this with Python ?

非常感谢！

推荐答案

您可以使用

You can use the transform argument to place in relative coordinates from 0.0 to 1.0 for example

plt.text(0.5,
         0.67,
         "d = {}".format(d),
         transform=plt.gca().transAxes)

在此本地系统中，(0, 0)是图的左下角，而(1, 1)是图的右上角. 这是在绘图上的各个位置放置和旋转文本的很好的参考.

In this local system (0, 0) is the lower-left and (1, 1) is the upper-right of the plot. Here is a good reference for placing and rotating text at various locations on the plot.

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