Periodic autoregressive moving average (PARMA) models are indicated for time series whose mean, variance and covariance function vary with the season. In this study, we develop and implement forecasting procedures for PARMA models. Forecasts are developed using the innovations algorithm, along with an idea of Ansley. A formula for the asymptotic error variance is provided, so that Gaussian prediction intervals can be computed. Finally, an application to monthly river flow forecasting is given, to illustrate the method.
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Univ Fed Santa Maria UFSM, Ave Roraima 1000, BR-97105900 Santa Maria, RS, BrazilUniv Fed Santa Maria UFSM, Ave Roraima 1000, BR-97105900 Santa Maria, RS, Brazil
Melchior, Cristiane
Zanini, Roselaine Ruviaro
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Univ Fed Santa Maria UFSM, Ave Roraima 1000, BR-97105900 Santa Maria, RS, BrazilUniv Fed Santa Maria UFSM, Ave Roraima 1000, BR-97105900 Santa Maria, RS, Brazil
Zanini, Roselaine Ruviaro
Guerra, Renata Rojas
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Univ Fed Santa Maria UFSM, Ave Roraima 1000, BR-97105900 Santa Maria, RS, BrazilUniv Fed Santa Maria UFSM, Ave Roraima 1000, BR-97105900 Santa Maria, RS, Brazil
Guerra, Renata Rojas
Rockenbach, Dinei A.
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Pontifical Catholic Univ Rio Grande Sul PUCRS, Sch Technol, 32nd Bldg,Ave Ipiranga 6681, BR-90619900 Porto Alegre, RS, BrazilUniv Fed Santa Maria UFSM, Ave Roraima 1000, BR-97105900 Santa Maria, RS, Brazil
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Univ Fed Santa Maria, Dept Estat, Santa Maria, RS, Brazil
Univ Fed Santa Maria, ACESM, Santa Maria, RS, BrazilUniv Fed Pernambuco, Dept Estat, Recife, PE, Brazil