UPPERBOUND Subcommand (CURVEFIT command)

UPPERBOUND is used with the logistic model (keyword LGSTIC) to specify an upper boundary value to be used in the regression equation.

  • The specification on UPPERBOUND must be a positive number and must be greater than the largest data value in any of the specified dependent variables.
  • The default UPPERBOUND value is infinity, so that 1/u = 0 and is dropped from the equation.
  • You can specify UPPERBOUND NO to reset the value to infinity when applying a previous model.
  • If you specify UPPERBOUND without LGSTIC, it is ignored.
  • Note that UPPERBOUND is a subcommand and cannot be used within a MODEL subcommand. For example, the following specification is not valid:
  /MODEL=CUBIC LGSTIC   /UPPER=99 LINEAR

The correct specification is:

  /MODEL=CUBIC LGSTIC LINEAR
  /UPPER=99