圖形預(yù)覽：

import numpy as npfrom matplotlib import pyplot as pltfrom mpl_toolkits.mplot3d import Axes3D1、開(kāi)口向上的拋物面

fig = plt.figure(figsize=(9,6), facecolor=’khaki’)ax = fig.gca(projection=’3d’)# 二元函數(shù)定義域平面集x = np.linspace(start=-3,stop=3,num=100)y = np.linspace(start=-3,stop=3,num=100)X, Y = np.meshgrid(x, y) # 網(wǎng)格數(shù)據(jù)Z = np.power(X, 2) + np.power(Y, 2) # 二元函數(shù) z = x**2 + y**2# 繪圖surf = ax.plot_surface(X=X, Y=Y, Z=Z, rstride=2, # row stride, 行跨度 cstride=2, # column stride, 列跨度 color=’r’, linewidth=0.5, )# 調(diào)整視角ax.view_init(elev=7, # 仰角 azim=30 # 方位角 )# 顯示圖形plt.show()

圖形：

fig = plt.figure(figsize=(9,6), facecolor=’khaki’)ax = fig.gca(projection=’3d’)# 二元函數(shù)定義域平面集x = np.linspace(start=-3,stop=3,num=100)y = np.linspace(start=-3,stop=3,num=100)X, Y = np.meshgrid(x, y) # 網(wǎng)格數(shù)據(jù)Z = np.power(X, 2) + np.power(Y, 2) # 二元函數(shù) z = x**2 + y**2# 繪圖surf = ax.plot_surface(X=X, Y=Y, Z=-Z, rstride=2, # row stride, 行跨度 cstride=2, # column stride, 列跨度 color=’g’, linewidth=0.5, )# 調(diào)整視角ax.view_init(elev=7, # 仰角 azim=30 # 方位角 )# 顯示圖形plt.show()

圖形：

3、用多子區(qū)顯示不同拋物面

fig = plt.figure(figsize=(24, 16), facecolor=’khaki’)# 二元函數(shù)定義域平面集x = np.linspace(start=-3,stop=3,num=100)y = np.linspace(start=-3,stop=3,num=100)X, Y = np.meshgrid(x, y) # 網(wǎng)格數(shù)據(jù)Z = np.power(X, 2) + np.power(Y, 2) # 二元函數(shù) z = x**2 + y**2# -------------------------------- subplot(221) --------------------------------ax = fig.add_subplot(221, projection=’3d’)# 開(kāi)口向上的拋物面surf = ax.plot_surface(X=X, Y=Y, Z=Z, rstride=2, # row stride, 行跨度 cstride=2, # column stride, 列跨度 color=’r’, linewidth=0.5, )# -------------------------------- subplot(223) --------------------------------ax = fig.add_subplot(223, projection=’3d’)# 開(kāi)口向下的拋物面surf = ax.plot_surface(X=X, Y=Y, Z=-Z, rstride=2, # row stride, 行跨度 cstride=2, # column stride, 列跨度 color=’g’, linewidth=0.5, )# -------------------------------- subplot(22, (2,4)) --------------------------------ax = plt.subplot2grid(shape=(2,2), loc=(0, 1), rowspan=2, projection=’3d’ )# 開(kāi)口向上的拋物面surf1 = ax.plot_surface(X=X, Y=Y, Z=Z, rstride=2, # row stride, 行跨度 cstride=2, # column stride, 列跨度 color=’r’, linewidth=0.5, )# 開(kāi)口向下的拋物面surf2 = ax.plot_surface(X=X, Y=Y, Z=-Z, rstride=2, # row stride, 行跨度 cstride=2, # column stride, 列跨度 color=’g’, linewidth=0.5, )# 調(diào)整視角ax.view_init(elev=7, # 仰角 azim=30 # 方位角 )# -------------------------------- fig --------------------------------# 調(diào)整子區(qū)布局fig.subplots_adjust(wspace=0.1, # width space hspace=0.15 # height space )# 顯示圖形plt.show()

圖形：

軟件版本：

以上為個(gè)人經(jīng)驗(yàn)，希望能給大家一個(gè)參考，也希望大家多多支持好吧啦網(wǎng)。如有錯(cuò)誤或未考慮完全的地方，望不吝賜教。