ORIGIN and NOORIGIN Subcommands (REGRESSION command)

ORIGIN and NOORIGIN control whether or not the constant is suppressed. By default, the constant is included in the model (NOORIGIN).

  • The specification is either the ORIGIN or NOORIGIN subcommand.
  • ORIGIN and NOORIGIN must be specified before the DEPENDENT and METHOD subcommands. The last specified remains in effect for all equations.
  • ORIGIN requests regression through the origin. The constant term is suppressed.
  • If you specify ORIGIN, statistics requested on the DESCRIPTIVES subcommand are computed as if the mean were 0.
  • ORIGIN and NOORIGIN affect the way the correlation matrix is built. If matrix materials are used as input to REGRESSION, the keyword that was in effect when the matrix was written should be in effect when that matrix is read.

Example

REGRESSION VAR=(COL)
 /ORIGIN
 /DEP=HOMICIDE
 /METHOD=ENTER POVPCT.
  • The REGRESSION command requests an equation that regresses HOMICIDE on POVPCT and suppresses the constant (ORIGIN).