如何修复: MatplotlibDeprecationWarning: shading='flat‘when X和Y具有与C相同的尺寸自3.3起已弃用

Question

我是python编程的新手，但在尝试从RAVDESS数据集wav文件绘制光谱图时，我已经与这些错误作了最长时间的斗争。这是代码；

`for file in range(0 , len(listOfFiles) , 1):
    windows_size = 20
    sample_rate , samples = wavfile.read(listOfFiles[file])
    nperseg = int(round(20 * sample_rate / 1e3))   
    frequencies , times, spectrogram = signal.spectrogram(samples, sample_rate) 
    plt.pcolormesh(times, frequencies, spectrogram)
    plt.imshow(spectrogram)
    plt.ylabel('Frequency [Hz]')
    plt.xlabel('Time [sec]')
    plt.show()`

以下是错误

<ipython-input-16-dc119f345487>:14: WavFileWarning: Chunk (non-data) not understood, skipping it.
  sample_rate , samples = wavfile.read(listOfFiles[file])
<ipython-input-16-dc119f345487>:14: WavFileWarning: Incomplete chunk ID: b'\x00', ignoring it.
  sample_rate , samples = wavfile.read(listOfFiles[file])
<ipython-input-16-dc119f345487>:17: MatplotlibDeprecationWarning: shading='flat' when X and Y have the same dimensions as C is deprecated since 3.3.  Either specify the corners of the quadrilaterals with X and Y, or pass shading='auto', 'nearest' or 'gouraud', or set rcParams['pcolor.shading'].  This will become an error two minor releases later.
  plt.pcolormesh(times, frequencies, spectrogram)

很抱歉，我不能更好地解释这些错误，但我是新手，任何帮助都将是令人惊讶的。

Answer 1

Add shading='auto'将解决此问题。

所以代码应该是plt.pcolormesh(times, frequencies, spectrogram,shading='auto' )

Answer 2

Add shading='auto'将解决此问题。

所以代码应该是

plt.pcolormesh(times, frequencies, spectrogram,shading='auto' )

Answer 3

我解决了更改rcparams：plt.rcParams['pcolor.shading'] ='nearest'的问题。希望这能对某些人有所帮助。