在matplotlib中动画旋转3D图形

Question

我有一个散点图设置和绘制我想要的方式，我想创建一个.mp4视频的空间旋转图，就好像我已经使用了plt.show()并拖动了周围的观点。

This answer几乎正是我想要的，除了保存电影，我将不得不手动调用FFMpeg与图像文件夹。我宁愿使用Matplotlib内置的动画支持，而不是保存单个帧。代码转载如下：

from mpl_toolkits.mplot3d import Axes3D 
ax = Axes3D(fig) 
ax.scatter(xx,yy,zz, marker='o', s=20, c="goldenrod", alpha=0.6) 
for ii in xrange(0,360,1): 
    ax.view_init(elev=10., azim=ii) 
    savefig("movie"%ii+".png") 

Answer 1

如果您想了解更多关于matplotlib动画你真的应该遵循this tutorial。它详细解释了如何创建动画图。

注意：创建动画图要求安装ffmpeg或mencoder。

这是他的第一个例子的一个版本，改为与你的散点图一起工作。

# First import everthing you need 
import numpy as np 
from matplotlib import pyplot as plt 
from matplotlib import animation 
from mpl_toolkits.mplot3d import Axes3D 

# Create some random data, I took this piece from here: 
# http://matplotlib.org/mpl_examples/mplot3d/scatter3d_demo.py 
def randrange(n, vmin, vmax): 
    return (vmax - vmin) * np.random.rand(n) + vmin 
n = 100 
xx = randrange(n, 23, 32) 
yy = randrange(n, 0, 100) 
zz = randrange(n, -50, -25) 

# Create a figure and a 3D Axes 
fig = plt.figure() 
ax = Axes3D(fig) 

# Create an init function and the animate functions. 
# Both are explained in the tutorial. Since we are changing 
# the the elevation and azimuth and no objects are really 
# changed on the plot we don't have to return anything from 
# the init and animate function. (return value is explained 
# in the tutorial. 
def init(): 
    ax.scatter(xx, yy, zz, marker='o', s=20, c="goldenrod", alpha=0.6) 
    return fig, 

def animate(i): 
    ax.view_init(elev=10., azim=i) 
    return fig, 

# Animate 
anim = animation.FuncAnimation(fig, animate, init_func=init, 
           frames=360, interval=20, blit=True) 
# Save 
anim.save('basic_animation.mp4', fps=30, extra_args=['-vcodec', 'libx264']) 

Answer 2

正在调查我的动画与地块时matplotlib我偶然发现了这一点： http://zulko.wordpress.com/2012/09/29/animate-your-3d-plots-with-pythons-matplotlib/

它提供了简单的功能，以动画绕了多种格式的曲线和输出。