pandas中沒有了'rolling_mean' 'rolling_std' 'ewma'

rolmean = pd.rolling_mean(timeseries, window=12)

rolstd = pd.rolling_std(timeseries, window=12)

expwighted_avg = pd.ewma(ts_log, halflife=12)

會有報錯

AttributeError: module 'pandas' has no attribute 'rolling_mean'

AttributeError: module 'pandas' has no attribute 'rolling_std'

AttributeError: module 'pandas' has no attribute 'ewma'

這是由於pandas版本跟新了，應該改成

rolmean = timeseries.rolling(12).mean()
rolstd = timeseries.rolling(12).std()

expwighted_avg = pd.DataFrame.ewm(ts_log, halflife=12).mean()