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Matplotlib??????

1. ???????

import numpy as npimport matplotlib.pyplot as plt

2. ?????????

step = 0.01x = np.arange(-10, 10, step)y = np.arange(-10, 10, step)

3. ??????

X, Y = np.meshgrid(x, y)

4. ???????????

Z = -(X**2 + Y**2)

5. ?????

contourf = plt.contourf(X, Y, Z, levels=6, cmap='hot')

6. ??????????

contour = plt.contour(X, Y, Z, levels=8, colors='k')plt.clabel(contour, fontsize=10, colors='k')

7. ???????

plt.xticks([])plt.yticks([])

8. ?????

plt.colorbar(contourf)

9. ????

plt.show()

???????Matplotlib???????????-10?10?????????????????

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