ValueError: x and y must have same first dimension, but have shapes (2140699,) and (4281398,)

Question

我使用 miniconda jupyter notebook python 并且我正在尝试实现一台机器（音频过滤）。我收到这个错误，我真的不知道如何解决它。

这里我用文件路径导入了我需要的库：

import wave as we
import numpy as np
import matplotlib.pyplot as plt

dir = r'/home/pc/Downloads/Bubble audios'

这里是绘制图形的函数：

def read_wav(wavfile, plots=True, normal=False):
    f = wavfile
    params = f.getparams()
    # print(params)
    nchannels, sampwidth, framerate, nframes = params[:4]
    strData = f.readframes(nframes)  # , string format
    waveData = np.frombuffer(strData, dtype=np.int16) # Convert a string to an int
    # wave amplitude normalization
    if normal == True:
        waveData = waveData*1.0/(max(abs(waveData)))
    # 
    if plots == True:
        time = np.arange(0, nframes ,dtype=np.int16) *(1.0 / framerate)
        plt.figure(dpi=100)
        plt.plot(time, waveData)
        plt.xlabel("Time")
        plt.ylabel("Amplitude")
        plt.title("Single channel wavedata")
        plt.show()
        
    return (Wave, time)

def fft_wav(waveData, plots=True):
    f_array = np.fft.fft(waveData)  # Fourier transform, the result is a complex array
    f_abs = f_array
    axis_f = np.linspace(0, 250, np.int(len(f_array)/2))  # map to 250
    # axis_f = np.linspace(0, 250, np.int(len(f_array))) # map to 250
    if plots == True:
        plt.figure(dpi=100)
        plt.plot(axis_f, np.abs(f_abs[0:len(axis_f)]))
        # plt.plot(axis_f, np.abs(f_abs))
        plt.xlabel("Frequency")
        plt.ylabel("Amplitude spectrum")
        plt.title("Tile map")
        plt.show()
    return f_abs

在这里我用我想要读取和绘制的文件调用函数。

f = we.open(dir+r'/Ars1_Aufnahme.wav', 'rb')
Wave, time = read_wav(f)

我得到的错误：

ValueError: x and y must have same first dimension, but have shapes (2140699,) and (4281398,)

我尝试使用 np.reshape 但它没有用，或者我可能用错了。那么，有什么建议吗？

Answer 1

看来你的时间是你波浪大小的1/2。也许您的 nframe 太短了。如果你这样做 nframses = 2*nframes 错误是什么？

ValueError: x and y must have same first dimension, but have shapes (2140699,) and (4281398,)

ValueError: x and y must have same first dimension, but have shapes (2140699,) and (4281398,)

python-3.x

numpy

jupyter-notebook

anaconda

miniconda