SEASONAL Subcommand (ACF command)

Use the SEASONAL subcommand to focus attention on the seasonal component by displaying and plotting autocorrelations at periodic lags only.

  • There are no additional specifications on SEASONAL.
  • If SEASONAL is specified, values are displayed and plotted at the periodic lags indicated on the PERIOD subcommand. If PERIOD is not specified, the periodicity established on the TSET or DATE command is used (see the PERIOD subcommand).
  • If SEASONAL is not specified, autocorrelations for all lags up to the maximum are displayed and plotted.

Example

ACF VARIABLES = SALES
  /SEASONAL
  /PERIOD=12.
  • In this example, autocorrelations are displayed only at every 12th lag.