The Alias Matrix
The Alias Matrix entries represent the degree of bias imparted to model parameters by the effects that you specified in the Alias Terms outline. The Alias Matrix is also used in defining alias optimality. See “Alias Optimality” in the “Custom Designs” chapter.
Calculations for the Alias Matrix are based on the model matrix. See “Model Matrix” in the “Custom Designs” chapter.
Let X1 be the model matrix corresponding to the terms in the Model outline. Denote the matrix of model terms for the effects specified in the Alias Terms outline by X2.
The assumed model is given as follows:
Equation shown here
Suppose that some of the alias terms are active ...

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