報錯描述
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ValueError: Unknown projection '3d'
# -*- coding: utf-8 -*-
"""
@File : 1.py
@Time : 2020/5/25 21:33
@Author : Dontla
@Email : [email protected]
@Software: PyCharm
"""
# 第一種創建3D圖形的方法:創建子圖
# 用創建子圖的方法畫出來感覺要比下面的方法小一點??
from matplotlib import pyplot as plt # 用來繪製圖形
import numpy as np # 用來處理數據
fig = plt.figure()
print('fig的類型:', type(fig), '\n')
print('fig:\n', fig, '\n')
ax = fig.add_subplot(111, projection='3d')
print('ax的類型:', type(ax), '\n')
print('ax:\n', ax, '\n')
X = np.arange(-10, 10, 0.25)
Y = np.arange(-10, 10, 0.25)
X, Y = np.meshgrid(X, Y)
Z = 3 * X ** 2 + 2 * Y ** 2 + 5
ax.plot_surface(X, Y, Z, cmap='rainbow')
plt.show()
D:\20200228_play_with_pytorch\python\python.exe C:/Users/SIQI/Desktop/繪製神經網絡輸出函數圖像/1.py
Traceback (most recent call last):
File "D:\20200228_play_with_pytorch\python\lib\site-packages\matplotlib\projections\__init__.py", line 58, in get_projection_class
return projection_registry.get_projection_class(projection)
File "D:\20200228_play_with_pytorch\python\lib\site-packages\matplotlib\projections\__init__.py", line 25, in get_projection_class
return self._all_projection_types[name]
KeyError: '3d'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:/Users/SIQI/Desktop/繪製神經網絡輸出函數圖像/1.py", line 23, in <module>
ax = fig.add_subplot(111, projection='3d')
File "D:\20200228_play_with_pytorch\python\lib\site-packages\matplotlib\figure.py", line 1396, in add_subplot
self._process_projection_requirements(*args, **kwargs)
File "D:\20200228_play_with_pytorch\python\lib\site-packages\matplotlib\figure.py", line 1120, in _process_projection_requirements
projection_class = projections.get_projection_class(projection)
File "D:\20200228_play_with_pytorch\python\lib\site-packages\matplotlib\projections\__init__.py", line 60, in get_projection_class
raise ValueError("Unknown projection %r" % projection)
ValueError: Unknown projection '3d'
fig的類型: <class 'matplotlib.figure.Figure'>
fig:
Figure(640x480)
Process finished with exit code 1
解決辦法
在開頭加上這句代碼
from mpl_toolkits.mplot3d import Axes3D
然後就可以運行了
參考文章1:深入淺出python機器學習_如何用python畫三維圖? add_subplot() Axes3D() plot_surface() gca()