将度数符号插入 python 图中
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Inserting a degree symbol into python plot
提问by user2739143
This is a really simple problem but its escaping me. I'm just trying to insert a degree symbol into the titles and legends of my python plot. Code is below. Thanks.
这是一个非常简单的问题，但它逃脱了我。我只是想在我的 python 情节的标题和图例中插入一个度数符号。代码如下。谢谢。
from numpy import *
import numpy as np
import matplotlib.pyplot as plt
theta1 = linspace(0,60,610)
theta2 = linspace(0,45,460)
theta3 = linspace(45,90,460)
CTS = 1/cos(radians(theta1))
CTS0 = 1/cos(radians(60-theta2))
CTS45 = 1/cos(radians(105-theta3))
plt.plot(theta1,CTS,label=u'CTS Head at 0',linewidth=2)
plt.plot(theta2,CTS0,label='CTS Head at 60',linewidth=2)
plt.plot(theta3,CTS45,label='CTS Head at 105',linewidth=2)
plt.xlabel('Manufactured Ply Angle (degrees)')
plt.ylabel('Thickness')
plt.legend( loc='lower right', numpoints = 1 )
plt.ylim([0,2.5])
plt.grid(b=None, which='major', axis='both')
plt.grid(color='k', linestyle='--', linewidth=0.5)
plt.axhline(y=1.035, xmin=0, xmax=90,color='k', linestyle='-', linewidth=1)
plt.show()
采纳答案by Mailerdaimon
Use LaTeX Style. For Example: $^\circ$ Textwould produce °Text
使用 LaTeX 样式。例如：$^\circ$ Text会产生°Text
See the matplotlib documentationfor more information about printing (especially mathematical expression).
有关打印（尤其是数学表达式）的更多信息，请参阅matplotlib 文档。
In your case the code has to be: plt.xlabel('Manufactured Ply Angle $^\circ$')
在您的情况下，代码必须是： plt.xlabel('Manufactured Ply Angle $^\circ$')
The TeX part of the expression must be enclosed by dollar signs "$".
表达式的 TeX 部分必须用美元符号“$”括起来。
回答by dadaist
Use LaTeX math. On my system the best visual appearance is achieved with
使用 LaTeX 数学。在我的系统上，最好的视觉外观是通过
label = r'$45\degree$'
label = r'$45\degree$'
and it looks exactly like the default theta labels of a polar plot.
它看起来与极坐标图的默认 theta 标签完全一样。
As others have pointed out kludges like
正如其他人指出的那样
label = r'$45^\circ$'label = '$45^o$'
label = r'$45^\circ$'label = '$45^o$'
etc. work too but the visual appearance is not so good. On my system these workarounds render a symbol that is slightly too small. YMMV, thus one may want to try what looks best on her system.
等也能工作，但视觉外观不太好。在我的系统上，这些变通方法呈现的符号略小。YMMV，因此人们可能想尝试在她的系统上看起来最好的东西。
For example on a polar contour plot where radius is sine of zenith angle one may want to use
例如，在半径是天顶角正弦的极地等高线图上，您可能想要使用
deg_labels = np.array([5, 10, 20, 30, 45, 60, 90])
ax.set_rgrids(np.sin(np.deg2rad(deg_labels)),
labels=(r"${:.0f}\degree$".format(_) for _ in deg_labels))
