我有一个数据集,对于theta和phi的离散值,我有一些价值。我想在球体上表示这一点,使得在极角θ和方位角phi给出的球体上,颜色显示出特定的值。
我怎么能在python中做到这一点?
答案 0 :(得分:0)
我认为C# demo就是你所需要的。
最小例子:
from mayavi import mlab
import numpy as np
# Make sphere, choose colors
phi, theta = np.mgrid[0:np.pi:101j, 0:2*np.pi:101j]
x, y, z = np.sin(phi) * np.cos(theta), np.sin(phi) * np.sin(theta), np.cos(phi)
s = x*y # <-- colors
# Display
mlab.figure(1, bgcolor=(1, 1, 1), fgcolor=(0, 0, 0), size=(600, 500))
mlab.mesh(x, y, z, scalars=s, colormap='Spectral')
mlab.view()
mlab.show()
在Ubuntu 14.04中我说:
sudo apt-get install python-vtk python-scipy python-numpy
sudo pip install mayavi
python main.py # After saving the code below as main.py
以下是完整的代码:
# Author: Gael Varoquaux <gael.varoquaux@normalesup.org>
# Copyright (c) 2008, Enthought, Inc.
# License: BSD Style.
from mayavi import mlab
import numpy as np
from scipy.special import sph_harm
# Create a sphere
r = 0.3
pi = np.pi
cos = np.cos
sin = np.sin
phi, theta = np.mgrid[0:pi:101j, 0:2 * pi:101j]
x = r * sin(phi) * cos(theta)
y = r * sin(phi) * sin(theta)
z = r * cos(phi)
mlab.figure(1, bgcolor=(1, 1, 1), fgcolor=(0, 0, 0), size=(400, 300))
mlab.clf()
# Represent spherical harmonics on the surface of the sphere
for n in range(1, 6):
for m in range(n):
s = sph_harm(m, n, theta, phi).real
mlab.mesh(x - m, y - n, z, scalars=s, colormap='jet')
s[s < 0] *= 0.97
s /= s.max()
mlab.mesh(s * x - m, s * y - n, s * z + 1.3,
scalars=s, colormap='Spectral')
mlab.view(90, 70, 6.2, (-1.3, -2.9, 0.25))
mlab.show()
如果您的计算机速度较慢,您可以预计此示例的加载时间约为20秒。