在 matplotlib 中对齐 TeX 方程

发布于 2024-11-08 14:22:10 字数 460 浏览 0 评论 0原文

我有以下几行在我的 matplotlib 绘图上注释 TeX：

import matplotlib.pyplot as plt
from matplotlib import rc

rc('text', usetex=True)
rc('font', family='serif')

r = 1
v = 2
i = 3

notes = r"\noindent$R_L = {0}\\ V_2 = {1}\\ I_2 = {2}$".format(r, v, i)
plt.annotate(notes, xy=(5,5), xytext=(7,7))
plt.show()

How do I make the equals sign to another?我尝试了几种方法，例如 \begin{align}、&-placement，但我不太明白。

原文

I have the following lines to annotate TeX on my matplotlib plot:

import matplotlib.pyplot as plt
from matplotlib import rc

rc('text', usetex=True)
rc('font', family='serif')

r = 1
v = 2
i = 3

notes = r"\noindent$R_L = {0}\\ V_2 = {1}\\ I_2 = {2}$".format(r, v, i)
plt.annotate(notes, xy=(5,5), xytext=(7,7))
plt.show()

How do I make the equals signs align to each other? I experimented with several methods like \begin{align}, &-placement, but I don't quite get it right.

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氛圍 2024-11-15 14:22:10

使用eqnarray。
代码的简化版本：

#!/usr/bin/python
import matplotlib.pyplot as plt
from matplotlib import rc

rc('text', usetex=True)
rc('font', family='serif')

r = 1
v = 2
i = 3

plt.plot([1,2,3],[2,3,4],'ro-')

plt.text(2,2,r"\begin{eqnarray*}R_L&= 0\\ V_2&= 1\\ I_2&= 2\end{eqnarray*}")

#notes = r"\noindent$R_L = {0}\\ V_2 = {1}\\ I_2 = {2}$".format(r, v, i)
#plt.annotate(notes, xy=(5,5), xytext=(7,7))
plt.show()

为了使其正常工作，我必须安装 dvipng （按照此处的建议， http: //matplotlib.sourceforge.net/users/usetex.html）

Use eqnarray.
A simplified version of your code:

#!/usr/bin/python
import matplotlib.pyplot as plt
from matplotlib import rc

rc('text', usetex=True)
rc('font', family='serif')

r = 1
v = 2
i = 3

plt.plot([1,2,3],[2,3,4],'ro-')

plt.text(2,2,r"\begin{eqnarray*}R_L&= 0\\ V_2&= 1\\ I_2&= 2\end{eqnarray*}")

#notes = r"\noindent$R_L = {0}\\ V_2 = {1}\\ I_2 = {2}$".format(r, v, i)
#plt.annotate(notes, xy=(5,5), xytext=(7,7))
plt.show()

To get it working I had to install dvipng (as suggested here, http://matplotlib.sourceforge.net/users/usetex.html)

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