The AStructure method is used to specify a model. It can be used to:
▪Name the variables and parameters in the model.
▪Specify linear dependencies among the variables.
▪Place equality constraints on parameters.
▪Specify start values for parameters.
Syntax
object.AStructure (s)
The AStructure method syntax has the following parts:
Part |
Description |
object |
An object of type AmosEngine. |
s |
A string that refers to one of the following: • a regression weight • a regression equation • the covariance between two exogenous variables • the variance of a single exogenous variable s is discussed more fully under Extended explanation of the AStructure method. |
Placement: [2].
Remarks
Use the MStructure method to constrain the means of exogenous variables.
The AStructure and MStructure methods are provided for compatibility with the obsolete $structure and $mstructure commands. Consider using the newer Path, Cov, Var, Mean and Intercept methods for model specification.
See Also