matplotlib中的彩色线框图 [英] colored wireframe plot in matplotlib

问题描述

我正在尝试根据z值给线框图着色.我在互联网上找不到任何代码示例.

I am trying to color a wireframe plot according to the z-value. I can't find any code examples on the internet.

这是一个具有我想要的颜色的曲面图和一个我无法设法获得线上颜色的线框图的示例:

Here is an example of a surface plot that has the colors I want and a wireframe plot where I can't manage to get the colors on the lines:

import numpy as np
from mpl_toolkits.mplot3d import Axes3D
from matplotlib import cm
import matplotlib.pyplot as plt

# some numbers for the data
P=12000 #W
Q=1     #kg/s
DT=3    #K
cp=4169.32  #J/kgK

dDT=np.logspace(-2,0,20,endpoint=True)
dQ=Q*np.logspace(-3,-1,20,endpoint=True)

# the plotting data
m1,m2=np.meshgrid(dDT,dQ)
err=cp*np.sqrt((m1*Q)**2+(m2*DT)**2)/P

# the wiremesh plot that i need fixed
fig=plt.figure()
ax = fig.add_subplot(111, projection='3d')
ax.plot_wireframe(m1, m2, err, color=err/err.max(),cmap='jet')
ax.set_xlabel('dDT')
ax.set_ylabel('DQ')
ax.set_zlabel('relative error')

# the surface plot that has the colors i want
fig = plt.figure()
ax = fig.gca(projection='3d')

surf = ax.plot_surface(m1, m2, err,rstride=1,  cstride=1, cmap=cm.jet,
    linewidth=0.1, antialiased=False)

fig.colorbar(surf, shrink=0.5, aspect=5)

ax.set_xlabel('dDT')
ax.set_ylabel('DQ')
ax.set_zlabel('relative error')
plt.show()

谢谢您的帮助！

推荐答案

使用plot_wireframe时，每行只能有一种颜色. 相反，您可以使用plot_surface. 要使plot_surface设置edgecolor，您需要为其指定facecolor. 然后，您可以将Facecolors的Alpha值设置为零.

When you use plot_wireframe, each line can only have one color. Instead, you can use plot_surface. To get plot_surface to set the edgecolors, you need to give it facecolors. Then you can set the alpha of facecolors to zero.

from mpl_toolkits.mplot3d import axes3d
import matplotlib.pyplot as plt
from matplotlib import cm

X, Y, Z = axes3d.get_test_data(0.2)

# Normalize to [0,1]
norm = plt.Normalize(Z.min(), Z.max())
colors = cm.viridis(norm(Z))
rcount, ccount, _ = colors.shape

fig = plt.figure()
ax = fig.gca(projection='3d')
surf = ax.plot_surface(X, Y, Z, rcount=rcount, ccount=ccount,
                       facecolors=colors, shade=False)
surf.set_facecolor((0,0,0,0))
plt.show()

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