MxAlgebra is an S4 class. An MxAlgebra object is a named entity. New instances of this class can be created using the function mxAlgebra.
The MxAlgebra class has the following slots:
|name||-||The name of the object|
|formula||-||The R expression to be evaluated|
|result||-||a matrix with the computation result|
The ‘name’ slot is the name of the MxAlgebra object. Use of MxAlgebra objects in the
mxConstraint function or an objective function requires reference by name.
The ‘formula’ slot is an expression containing the expression to be evaluated. These objects are operated on or related to one another using one or more operations detailed in the
mxAlgebra help file.
The ‘result’ slot is used to hold the results of computing the expression in the ‘formula’ slot. If the containing model has not been executed, then the ‘result’ slot will hold a 0 x 0 matrix. Otherwise the slot will store the computed value of the algebra using the final estimates of the free parameters.
Slots may be referenced with the $ symbol. See the documentation for Classes and the examples in the
mxAlgebra document for more information.
The OpenMx User's guide can be found at http://openmx.ssri.psu.edu/documentation.