This function is a constructor for the
representing a positive-definite matrix with compound symmetry
structure (constant diagonal and constant off-diagonal elements). The
underlying matrix is represented by 2 unrestricted parameters.
numeric(0), an unitialized
object, a one-sided formula, or a vector of character strings,
object is returned as an uninitialized
object (with just some of its attributes and its class defined) and
needs to have its coefficients assigned later, generally using the
matrix replacement functions. If
object will be constructed from
as.matrix(value). Finally, if
value is a numeric vector
of length 2, it is assumed to represent the unrestricted coefficients
of the underlying positive-definite matrix.
an optional initialization value, which can be any of the
an optional one-sided linear formula specifying the
row/column names for the matrix represented by
an optional vector of character strings specifying the
row/column names for the matrix represented by object. It must have
length equal to the dimension of the underlying positive-definite
matrix and unreplicated elements. This argument is ignored when
an optional data frame in which to evaluate the variables
pdCompSymm object representing a positive-definite
matrix with compound symmetry structure, also inheriting from class
José Pinheiro and Douglas Bates [email protected]
Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models in S and S-PLUS", Springer, esp. p. 161.
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