我正在使用 Matplotlib 生成隐式方程图(例如 y^x=x^y)。非常感谢我已经收到的帮助,我已经走了很远。我已经使用等高线来制作情节。我剩下的问题是格式化轮廓线,例如宽度、颜色,尤其是 zorder,轮廓出现在我的网格线后面。当然,这些在绘制标准函数时可以正常工作。
import matplotlib.pyplot as plt
from matplotlib.ticker import MultipleLocator, FormatStrFormatter
import numpy as np
fig = plt.figure(1)
ax = fig.add_subplot(111)
# set up axis
ax.spines['left'].set_position('zero')
ax.spines['right'].set_color('none')
ax.spines['bottom'].set_position('zero')
ax.spines['top'].set_color('none')
ax.xaxis.set_ticks_position('bottom')
ax.yaxis.set_ticks_position('left')
# setup x and y ranges and precision
x = np.arange(-0.5,5.5,0.01)
y = np.arange(-0.5,5.5,0.01)
# draw a curve
line, = ax.plot(x, x**2,zorder=100,linewidth=3,color='red')
# draw a contour
X,Y=np.meshgrid(x,y)
F=X**Y
G=Y**X
ax.contour(X,Y,(F-G),[0],zorder=100,linewidth=3,color='green')
#set bounds
ax.set_xbound(-1,7)
ax.set_ybound(-1,7)
#add gridlines
ax.xaxis.set_minor_locator(MultipleLocator(0.2))
ax.yaxis.set_minor_locator(MultipleLocator(0.2))
ax.xaxis.grid(True,'minor',linestyle='-',color='0.8')
ax.yaxis.grid(True,'minor',linestyle='-',color='0.8')
plt.show()