Move beyond spreadsheets to data mining, forecasting, optimization – and more
The LAG function: Useful for more than time series analysis
To a statistician, the LAG function (which was introduced in SAS/IML 9.22) is useful for time series analysis. To a numerical analyst and a statistical programmer, the function provides a convenient way to compute quantitites that involve adjacent values in any vector. The LAG function is essentially a "shift operator."
