（Python）Matplotlib动画不显示 [英] (python) matplotlib animation doesn't show

问题描述

我基于 matplotlib 网站

我在哪里出错了？

解决方案

问题是你首先使用单色（1.0）定义图，因此将颜色范围设置为此。更新图形时，颜色范围是1.0 +-很小的值，因此您看不到更改。您需要使用 vmin / vmax 参数将颜色范围设置为一到零，如下所示：

  im = plt.imshow（视口，动画= True，vmin = 0。，vmax = 1。）
  

其余的代码保持不变，这应该可以正常工作。另一种选择是添加呼叫，

  im.autoscale（）
   im.set_array（viewpoint）之后的pre> 
 
 
强制每次更新颜色范围。
 
I wrote the following code based on the matplotlib site example.
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation

fig = plt.figure()
nFreqs = 1024
nFFTWindows = 512
viewport = np.ones((nFreqs, nFFTWindows))
im = plt.imshow(viewport, animated=True)


def updatefig(*args):
    global viewport
    print viewport
    viewport = np.roll(viewport, -1, axis=1)
    viewport[:, -1] = 0
    im.set_array(viewport)
    return im,


ani = animation.FuncAnimation(fig, updatefig, interval=50, blit=True)
plt.show()
Before changing the animation works, but now it doesn't. I expected it to start with a purple plot, which slowly turns yellow from the right edge to the left. The viewport variable does update correctly (checked it with print in my function).

I get the static image (all ones, like it was initially):



Where did I go wrong here?
解决方案
The problem is you are defining a plot initially with a single colour (1.0) so the colour range is set to this. When you update the figure, the range of colours is 1.0 +- some small value so you don't see the change. You need to set the colour range to between one and zero with vmin/vmax arguments as follows: 
im = plt.imshow(viewport, animated=True, vmin=0., vmax=1.)
The rest of the code stays the same and this should work as expected. Another alternative is to add the call,
im.autoscale()
after im.set_array(viewpoint) to force the colour range to be updated each time.

                        
这篇关于（Python）Matplotlib动画不显示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！