练习：绘制三维图像
#coding:utf-8
#/usr/bin/python
import numpy as np
import matplotlib as mpl
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
from matplotlib import cm
if __name__ == '__main__':
mpl.rcParams['font.sans-serif'] = [u'SimHei']
mpl.rcParams['axes.unicode_minus'] = False # win正常显示中文设置
x, y = np.mgrid[-3:3:7j, -3:3:7j]
print(x)
print(y)
u = np.linspace(-3, 3, 101)
x, y = np.meshgrid(u, u)
print(x)
print(y)
z = np.exp(-(x**2 + y**2)/2) / np.sqrt(2*np.pi) #第一幅图 三维高斯分布
# z = x*np.exp(-(x**2 + y**2)/2) / np.sqrt(2*np.pi)#第二幅图
# z = x * y * np.exp(-(x ** 2 + y ** 2) / 2) / np.sqrt(2 * np.pi)#第三幅图
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
# ax.plot_surface(x, y, z, rstride=5, cstride=5, cmap=cm.coolwarm, linewidth=0.1) #
ax.plot_surface(x, y, z, rstride=3, cstride=3, cmap=cm.viridis, linewidth=0.5)
plt.show()
# cmaps = [('Perceptually Uniform Sequential',
# ['viridis', 'inferno', 'plasma', 'magma']),
# ('Sequential', ['Blues', 'BuGn', 'BuPu',
# 'GnBu', 'Greens', 'Greys', 'Oranges', 'OrRd',
# 'PuBu', 'PuBuGn', 'PuRd', 'Purples', 'RdPu',
# 'Reds', 'YlGn', 'YlGnBu', 'YlOrBr', 'YlOrRd']),
# ('Sequential (2)', ['afmhot', 'autumn', 'bone', 'cool',
# 'copper', 'gist_heat', 'gray', 'hot',
# 'pink', 'spring', 'summer', 'winter']),
# ('Diverging', ['BrBG', 'bwr', 'coolwarm', 'PiYG', 'PRGn', 'PuOr',
# 'RdBu', 'RdGy', 'RdYlBu', 'RdYlGn', 'Spectral',
# 'seismic']),
# ('Qualitative', ['Accent', 'Dark2', 'Paired', 'Pastel1',
# 'Pastel2', 'Set1', 'Set2', 'Set3']),
# ('Miscellaneous', ['gist_earth', 'terrain', 'ocean', 'gist_stern',
# 'brg', 'CMRmap', 'cubehelix',
# 'gnuplot', 'gnuplot2', 'gist_ncar',
# 'nipy_spectral', 'jet', 'rainbow',
# 'gist_rainbow', 'hsv', 'flag', 'prism'])]
