代码出现错误Traceback (most recent call last): File "D:\Program Files\JetBrains\PyCharm 2023.1\PycharmProject\test\test2.py", line 20, in <module> b, a = signal.butter(order, [low, high], btype='band') AttributeError: 'numpy.ndarray' object has no attribute 'butter',请给我修改过后的代码
时间: 2024-03-20 13:43:09 浏览: 55
Mac下anaconda中Spyder打开报错Traceback(most recent call last)…问题
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根据错误提示可以看出,`butter`函数是Signal模块中的函数,而不是`ndarray`对象中的函数。因此,您需要将该函数的调用更改为`signal.butter`。以下是修改后的代码:
```python
import numpy as np
import matplotlib.pyplot as plt
from scipy import signal
order = 4
fs = 1000.0
low = 50.0
high = 200.0
nyq = 0.5 * fs
low /= nyq
high /= nyq
b, a = signal.butter(order, [low, high], btype='band')
w, h = signal.freqz(b, a)
plt.plot(0.5*fs*w/np.pi, np.abs(h), 'b')
plt.xlabel('Frequency (Hz)')
plt.ylabel('Gain')
plt.grid(True)
plt.show()
```
请注意,此代码需要导入Signal模块。如果您还没有安装此模块,可以使用以下命令安装:
```
pip install scipy
```
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