nlme (version 3.1-39)

coef.pdCompSymm: pdCompSymm Object Coefficients

Description

This method function extracts the coefficients associated with the positive-definite matrix represented by object.

Usage

## S3 method for class 'pdCompSymm':
coef(object, unconstrained, \dots)
coef(object) <- value

Arguments

object

an object inheriting from class pdCompSymm, representing a positive-definite matrix with compound symmetry structure.

unconstrained

a logical value. If TRUE the coefficients are returned in unconstrained form (the same used in the optimization algorithm). If FALSE the standard deviation and the correlation coefficient of the compound symmetry of

value

a vector with the replacement values for the coefficients associated with object. It must be a vector of length two and must be given in unconstrained form.

...

some methods for this generic require additional arguments. None are used in this method.

Value

• a vector with the coefficients corresponding to object.

SIDE EFFECTS

On the left side of an assignment, sets the values of the coefficients of object to value. Object must be initialized (using Initialize) before new values can be assigned to its coefficients.

See Also

coef.pdMat, pdMat

Examples

coef(pdCompSymm(diag(3)), FALSE)