The inverse function for \(f(x)\) is written as \(f^{-1}(x)\). To find an inverse function, form an equation by giving the output value a name using a letter (such as \(y\)), then rearrange the ...

The sample inverse autocorrelation function (SIACF) is estimated in the ARIMA procedure by the following steps. A high-order autoregressive model is fit to the data by means of the Yule-Walker ...