一. 安装
代码语言：javascript复制pip install mayavi -i https://pypi.tuna.tsinghua.edu.cn/simple # 报错 推荐下面的这条指令安装
pip install git https://github.com/enthought/mayavi.git
二. 使用
1. Mayavi库基本元素
1. 处理/显示图形的mlab模块
2. Mayavi的api
2. 快速绘图实例
实例代码1：
代码语言：javascript复制# coding=utf-8
from mayavi import mlab
x = [[-1,1,1,-1,-1],[-1,1,1,-1,-1]]
y = [[-1,-1,-1,-1,-1],[1,1,1,1,1]]
z = [[1,1,-1,-1,1],[1,1,-1,-1,1]]
s = mlab.mesh(x,y,z)
mlab.show()
效果：
只显示框的话：
代码语言：javascript复制from mayavi import mlab
x = [[-1,1,1,-1,-1],[-1,1,1,-1,-1]]
y = [[-1,-1,-1,-1,-1],[1,1,1,1,1]]
z = [[1,1,-1,-1,1],[1,1,-1,-1,1]]
s = mlab.mesh(x, y, z,representation = 'wireframe', line_width = 1.0)
mlab.show()
效果：
实例代码2：
代码语言：javascript复制from numpy import pi,sin,cos,mgrid
from mayavi import mlab
#建立数据
dphi, dtheta = pi/250.0, pi/250.0
[phi,theta] = mgrid[0:pi dphi*1.5:dphi,0:2*pi dtheta*1.5:dtheta]
m0 = 4;m1 = 3;m2 = 2;m3 = 3;m4 = 6;m5 = 2;m6 = 6;m7 = 4
r = sin(m0*phi)**m1 cos(m2*phi)**m3 sin(m4*theta)**m5 cos(m6*theta)**m7
x = r*sin(phi)*cos(theta)
y = r*cos(phi)
z = r*sin(phi)*sin(theta)
#对数据进行三维可视化
s = mlab.mesh(x,y,z)
mlab.show()
效果：
3 基于numpy数组绘图
基本知识：
1. Points3d
实现代码：
代码语言：javascript复制import numpy as np
from mayavi import mlab
def test_points3d():
t = np.linspace(0, 4 * np.pi, 20)
x = np.sin(2 * t)
y = np.cos(t)
z = np.cos(2 * t)
s = 2 np.sin(t)
return mlab.points3d(x, y, z, s, colormap="Reds", scale_factor=.25) # s (x,y,z)处标量的值 copper
test_points3d()
mlab.show()
参数说明：
结果：
2. Plot3d
实现代码：
代码语言：javascript复制from mayavi import mlab
import numpy as np
n_mer, n_long = 6, 11
dphi = np.pi / 1000.0
phi = np.arange(0.0, 2*np.pi 0.5*dphi, dphi)
mu = phi * n_mer
x = np.cos(mu) (1 np.cos(n_long*mu/n_mer)*0.5)
y = np.sin(mu) (1 np.cos(n_long*mu/n_mer)*0.5)
z = np.sin(n_long * mu / n_mer) * 0.5
l = mlab.plot3d(x, y, z, np.sin(mu), tube_radius = 0.025, colormap = 'Spectral')
mlab.show()
效果：
3. imshow
实现代码：
代码语言：javascript复制from mayavi import mlab
import numpy as np
s = np.random.random((10, 10))
img = mlab.imshow(s, colormap = 'gist_earth')
mlab.show()
效果：
4. surf
实现代码1：
代码语言：javascript复制from mayavi import mlab
import numpy as np
def f(x, y):
return np.sin(x-y) np.cos(x y)
x, y = np.mgrid[-7.:7.05:0.1, -5.:5.05:0.05]
s = mlab.surf(x, y, f)
mlab.show()
效果：
实现代码2：
代码语言：javascript复制from mayavi import mlab
import numpy as np
def f(x, y):
return np.sin(x-y) np.cos(x y)
x, y = np.mgrid[-7.:7.05:0.1, -5.:5.05:0.05]
s = mlab.contour_surf(x, y, f)
mlab.show()
效果：
5. contour3d
实现代码：
代码语言：javascript复制from mayavi import mlab
import numpy as np
x, y, z = np.ogrid[-5:5:64j, -5:5:64j, -5:5:64j]
scalars = x*x y*y z*z
obj = mlab.contour3d(scalars, contours=8, transparent=True)
mlab.show()
效果：
6. quiver3d
实现代码：
代码语言：javascript复制import numpy as np
from mayavi import mlab
x, y, z = np.mgrid[-2:3, -2:3, -2:3]
r = np.sqrt(x ** 2 y ** 2 z ** 4)
u = y * np.sin(r)/(r 0.001)
v = -x * np.sin(r)/(r 0.001)
w = np.zeros_like(z)
obj = mlab.quiver3d(x, y, z, u, v, w, line_width=3, scale_factor=1)
mlab.show()
效果：
