python 画园和椭圆

Posted 2021-03-23 gisoracle

from matplotlib.patches import Ellipse, Circle
import matplotlib.pyplot as plt

fig = plt.figure()
ax = fig.add_subplot(111)

ell1 = Ellipse(xy = (0.0, 0.0), width = 10, height = 5, angle = 0.0, facecolor= \'yellow\', alpha=0.3)
cir1 = Circle(xy = (0.0, 0.0), radius=2, alpha=0.5)
ax.add_patch(ell1)
ax.add_patch(cir1)

x, y = 0, 0
ax.plot(x, y, \'ro\')

plt.axis(\'scaled\')
ax.spines[\'right\'].set_color(\'none\')  # 设置右‘脊梁’为无色
ax.spines[\'top\'].set_color(\'none\')  # 设置上‘脊梁’为无色
ax.xaxis.set_ticks_position(\'bottom\')  # 底部‘脊梁’设置为X轴
ax.spines[\'bottom\'].set_position((\'data\', 0))  # 底部‘脊梁’移动位置，y的data
ax.yaxis.set_ticks_position(\'left\')  # 左部‘脊梁’设置为Y轴
ax.spines[\'left\'].set_position((\'data\', 0))  # 左部‘脊梁’移动位置，x的data
plt.savefig(\'d:/test2.png\')

#plt.axis(\'equal\')   #changes limits of x or y axis so that equal increments of x and y have the same length

plt.show()

来自：https://www.cnblogs.com/yibeimingyue/p/9916048.html

from matplotlib.patches import Ellipse, Circle
import matplotlib.pyplot as plt

fig = plt.figure()
ax = fig.add_subplot(111)

ell1 = Ellipse(xy = (0.0, 0.0), width = 10, height = 5, angle = 0.0, facecolor= \'yellow\', alpha=0.3)
cir1 = Circle(xy = (0.0, 0.0), radius=2, alpha=0.5)
ax.add_patch(ell1)
ax.add_patch(cir1)

x, y = 0, 0
ax.plot(x, y, \'ro\')

plt.axis(\'scaled\')
ax.spines[\'right\'].set_color(\'none\')  # 设置右‘脊梁’为无色
ax.spines[\'top\'].set_color(\'none\')  # 设置上‘脊梁’为无色
ax.xaxis.set_ticks_position(\'bottom\')  # 底部‘脊梁’设置为X轴
ax.spines[\'bottom\'].set_position((\'data\', 0))  # 底部‘脊梁’移动位置，y的data
ax.yaxis.set_ticks_position(\'left\')  # 左部‘脊梁’设置为Y轴
ax.spines[\'left\'].set_position((\'data\', 0))  # 左部‘脊梁’移动位置，x的data
plt.savefig(\'d:/test2.png\')

#plt.axis(\'equal\')   #changes limits of x or y axis so that equal increments of x and y have the same length

plt.show()