MODEL Subcommand (CURVEFIT command)

MODEL specifies the model or models to be fit to the data. The default model is LINEAR.

  • You can fit any or all of the 11 available models.
  • Model name keywords can be abbreviated to the first three characters.
  • You can use the keyword ALL to fit all models.
  • When the LGSTIC model is specified, the upperbound value is included in the output.

The following model keywords are available:

LINEAR, LGSTIC, POWER, COMPOUND, CUBIC, QUADRATIC, INVERSE, LOGARITHMIC, S, GROWTH, EXPONENTIAL

Example

CURVEFIT VARIABLES = VARX.
  • This command fits a curve to VARX using the linear regression model (the default).

Example

CURVEFIT VARIABLES = VARY
  /MODEL=GROWTH EXPONENTIAL.
  • This command fits two curves to VARY, one using the growth model and the other using the exponential model.