correct.degfree: Check the degrees of freedom in an object of class projector

In dae: Functions Useful in the Design and ANOVA of Experiments

Check the degrees of freedom in an object of class projector

Description

Check the degrees of freedom in an object of class "projector".

Usage

correct.degfree(object)

Arguments

object

An object of class "projector" whose degrees of freedom are to be checked.

Details

The degrees of freedom of the projector are obtained as its number of nonzero eigenvalues. An eigenvalue is regarded as zero if it is less than daeTolerance, which is initially set to.Machine$double.eps ^ 0.5 (about 1.5E-08). The function set.daeTolerance can be used to change daeTolerance.

Value

TRUE or FALSE depending on whether the correct degrees of freedom have been stored in the object of class "projector".

Author(s)

Chris Brien

See Also

degfree, projector in package dae.

projector for further information about this class.

Examples

## set up a 2 x 2 mean operator that takes the mean of a vector of 2 values
m <- matrix(rep(0.5,4), nrow=2)

## create a projector based on the matrix m
proj.m <- new("projector", data=m)

## add its degrees of freedom
degfree(proj.m) <- 1
    
## check degrees of freedom are correct
correct.degfree(proj.m)

dae documentation built on Aug. 21, 2025, 5:56 p.m.