The MxAlgebra class has the following slots: rcl{
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.