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)
Arguments
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.
References
Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models
in S and S-PLUS", Springer, esp. p. 162.