python - scipy.signal.cwt 在 correlate() 中出现值错误

Question

尝试使用 scipy.signal.cwt 时出现一个奇怪的错误：

我有一些列表c，我想像这样进行连续小波变换：

scipy.signal.cwt(np.array(c), scipy.signal.morlet, np.arange(.01,.1,.01))

我得到一个奇怪的错误：

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-55-5af5e14b96cd> in <module>()
----> 1 sig.cwt(a, sig.morlet, np.arange(.01,.1,.01))

/usr/local/lib/python2.7/site-packages/scipy/signal/wavelets.pyc in cwt(data, wavelet,     widths)
    359         wavelet_data = wavelet(min(10 * width, len(data)), width)
    360         output[ind, :] = convolve(data, wavelet_data,
--> 361                                               mode='same')
    362     return output

/usr/local/lib/python2.7/site-packages/scipy/signal/signaltools.pyc in convolve(in1,     in2, mode)
    270 
    271     if np.iscomplexobj(kernel):
--> 272         return correlate(volume, kernel[slice_obj].conj(), mode)
    273     else:
    274         return correlate(volume, kernel[slice_obj], mode)

/usr/local/lib/python2.7/site-packages/scipy/signal/signaltools.pyc in correlate(in1, in2, mode)
    129         in1zpadded = np.zeros(ps, in1.dtype)
    130         sc = [slice(0, i) for i in in1.shape]
--> 131         in1zpadded[sc] = in1.copy()
    132 
    133         if mode == 'full':

ValueError: could not broadcast input array from shape (66467) into shape (66466)

是什么导致了这个错误？

Answer 1

的第三个参数scipy.signal.cwt是宽度，它必须大于 1，因此将代码更改为：

scipy.signal.cwt(np.array(c), scipy.signal.morlet, np.arange(.01,.1,.01) * len(c))