Method for the function deviance that allows the user to extract the value
of the deviance corresponding to a selected GeDS fit from a GeDS-Class object.
# S3 method for GeDS
deviance(object, n = 3L, ...)the GeDS-class object from which the deviance should be extracted.
integer value (2, 3 or 4) specifying the order (\(=\) degree \(+ 1\)) of the GeDS fit
whose deviance should be extracted.
By default equal to 3L.
Non-integer values will be passed to the function as.integer.
potentially further arguments (required by the definition of the generic function). They will be ignored, but with a warning.
A numeric value corresponding to the deviance of the selected GeDS fit.
This is a method for the function deviance.
As GeDS-class objects contain three different fits (linear, quadratic and cubic),
it is possible
to specify the order of the GeDS fit for which the deviance is required via the input argument n.