Matrices of an reStruct Object

This method function extracts the positive-definite matrices corresponding to the pdMat elements of object.

# S3 method for class 'reStruct'
as.matrix(x, ...)

Arguments

x

an object inheriting from class "reStruct", representing a random effects structure and consisting of a list of pdMat objects.

...

further arguments passed from other methods.

Value

a list with components given by the positive-definite matrices corresponding to the elements of object.

References

Pinheiro, J. C. and Bates, D. M. (2000), Mixed-Effects Models in S and S-PLUS, Springer, New York.

Author

José Pinheiro and Douglas Bates bates@stat.wisc.edu

Examples

rs1 <- reStruct(pdSymm(diag(3), ~age+Sex, data = Orthodont))
as.matrix(rs1)
#> [[1]]
#>             (Intercept) age SexFemale
#> (Intercept)           1   0         0
#> age                   0   1         0
#> SexFemale             0   0         1
#>