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#コード例
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df2にデータが入っています。
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```Python
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バターワースフィルタ（バンドパス）
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def bandpass(x, samplerate, fp, fs, gpass, gstop):
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gpass = 3
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gstop = 10
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x = np.arange(0, len(df2[" EXG Channel 4"])) / samplerate # 波形生成のための時間軸の作成
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for z in df2.columns:
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fp = np.array([1, 50])
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fs = np.array([45,55])
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df3[z] = bandstop(data_bandfilt, samplerate, fp, fs, gpass, gstop)
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```
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x = np.arange(0, len(df2[" EXG Channel 4"])) / samplerate # 波形生成のための時間軸の作成
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gpass = 3
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gstop = 10
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samplerate = 250
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x = np.arange(0, len(df2[" EXG Channel 4"])) / samplerate # 波形生成のための時間軸の作成
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