This function gives an alternative way of constructing an object
inheriting from the pdMat class named in pdClass, or
from data.class(object) if object inherits from
pdMat, and is mostly used internally in other functions. See
the documentation on the principal constructor function, generally
with the same name as the pdMat class of object.
Usage
pdMat(value, form, nam, data, pdClass)
Arguments
Value
a pdMat object representing a positive-definite matrix,
inheriting from the class named in pdClass, or from
class(object), if object inherits from pdMat.
References
Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models
in S and S-PLUS", Springer.