APPLY Subcommand (PACF command)

APPLY allows you to use a previously defined PACF model without having to repeat the specifications.

  • The only specification on APPLY is the name of a previous model enclosed in quotes. If a model name is not specified, the model that was specified on the previous PACF command is used.
  • To change one or more model specifications, specify the subcommands of only those portions that you want to change, placing the specifications after the APPLY subcommand.
  • If no series are specified on the PACF command, the series that were originally specified with the model that is being reapplied are used.
  • To change the series that are used with the model, enter new series names before or after the APPLY subcommand.

Example

PACF VARIABLES = TICKETS
  /LN
  /DIFF=1
  /SDIFF=1
  /PER=12
  /MXAUTO=25.
PACF VARIABLES = ROUNDTRP
  /APPLY.
  • The first command specifies a maximum of 25 partial autocorrelations for the series TICKETS after it has been log-transformed, differenced once, and had one degree of seasonal differencing with a periodicity of 12 applied to it. This model is assigned the default name MOD_1.
  • The second command displays and plots partial autocorrelations for series ROUNDTRP by using the same model that was specified for series TICKETS.