nlme (version 3.1-29)

pdMat: Positive-Definite Matrix

Description

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)

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.

See Also

pdCompSymm, pdDiag, pdIdent, pdNatural, pdSymm

Examples

pd1 <- pdMat(diag(1:4), pdClass = "pdDiag")
pd1