matplotlib实现三维柱状图 import cv2 img = cv2.imread("1.png", 0) #特征点在图片中的坐标位置 m = 448 n = 392 import numpy as np import matplotlib.pyplot as plt # This import registers the 3D projection, but is otherwise unused. from mpl_toolkits.mplot3d import Axes3…
1.basic numpy.meshgrid 由一维数组到二维数组,用于生成网格数据 matplotlib python绘图库 2.code In [88]: from mpl_toolkits.mplot3d import Axes3D In [89]: from matplotlib import cm In [108]: from matplotlib.ticker import LinearLocator,FormatStrFormatter In [91]: import matplo…
from mpl_toolkits.mplot3d import Axes3D import matplotlib.pyplot as plt import numpy as np from matplotlib import cm fig=plt.figure() ax=fig.add_subplot(111,projection='3d') u=np.linspace(-1,1,100) x,y=np.meshgrid(u,u) z=x**2+y**2 ax.plot_surface(x,y…