from statsmodels.graphics.tsaplots import plot_pacf plot_pacf(pacf, lags=20, method='ols', title='pa').showValueError: Can only compute partial correlations for lags up to 50% of the sample size. The requested nlags 20 must be < 10.이런 에러가 떠서 좀 헤맸네요.  결론적으로 선생님 코드from statsmodels.tsa.stattools import pacfpacf = pacf(df['cnt'], nlags=20, method='ols')print(pacf)from statsmodels.graphics.tsaplots import plot_pacfplot_pacf(pacf, lags=20, method='ols', title='pa').show는from statsmodels.tsa.stattools import pacfpacf_values = pacf(df['cnt'], nlags=20, method='ols')print(pacf_values)from statsmodels.graphics.tsaplots import plot_pacfplot_pacf(df['cnt'], lags=20, method='ols', title='pa').show 로 바꿔주시면 에러 없이 차트 표출이 됩니다.