nlme (version 3.1-31)

pdMatrix.reStruct: Extract Matrix or Square-Root Factor from Components of an reStruct Object

Description

This method function extracts the positive-definite matrices corresponding to the pdMat elements of object, or square-root factors of the positive-definite matrices.

Usage

## S3 method for class 'reStruct':
pdMatrix(object, factor)

Value

a list with components given by the positive-definite matrices corresponding to the elements of object, or square-root factors of the positive-definite matrices.

See Also

as.matrix.reStruct, reStruct, pdMatrix.pdMat

Examples

data(Orthodont)
rs1 <- reStruct(pdSymm(diag(3), ~age+Sex, data = Orthodont))
pdMatrix(rs1)