在matplotlib中動畫旋轉3D圖形

Question

我有一個散點圖設置和繪製我想要的方式，我想創建一個.mp4視頻的空間旋轉圖，就好像我已經使用了plt.show()並拖動了周圍的觀點。

This answer幾乎正是我想要的，除了保存電影，我將不得不手動調用FFMpeg與圖像文件夾。我寧願使用Matplotlib內置的動畫支持，而不是保存單個幀。代碼轉載如下：

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

如果您想了解更多關於matplotlib動畫你真的應該遵循this tutorial。它詳細解釋瞭如何創建動畫圖。

注意：創建動畫圖要求安裝ffmpeg或mencoder。

這是他的第一個例子的一個版本，改爲與你的散點圖一起工作。

# 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

正在調查我的動畫與地塊時matplotlib我偶然發現了這一點： http://zulko.wordpress.com/2012/09/29/animate-your-3d-plots-with-pythons-matplotlib/

它提供了簡單的功能，以動畫繞了多種格式的曲線和輸出。