checkMultRoot: Assess plausibility of parameter estimates

Description Usage Arguments Details Value Author(s) Examples

Description

Check out and compare estimated roots of the quasi-score vector

Usage

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checkMultRoot(est, par = NULL, opts = NULL, verbose = FALSE)

Arguments

est

object of class qle, the estimation results from function qle

par

list or matrix of estimated parameters as roots of the quasi-score vector

opts

list of upper bounds for a root of the quasi-score vector, see details

verbose

logical, TRUE for intermediate output

Details

Only for the quasi-likelihood approach the function inspects the (numerical) consistency of the found parameters in 'par' by comparing each observed quasi-information matrix with the expected one. The degree of dissimilarity of both matrices is measured by certain scalar equivalent criteria (see vignette) and the parameter for which these are smallest is chosen.

Value

A data frame with columns named corresponding to each component of the investigated parameter, 'minor', 'det', 'value', 'score_max', 'logdetI', 'lamI_min', 'lamIm_max' and 'varS_trace' (see vignette for details). The first column shows the leading minor of the observed QI matrix which is not positive definite. Estimated model parameters for which the observed QI matrix is not positive definite are excluded from further root selection.

Author(s)

M. Baaske

Examples

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 data(qleresult)

 # and just a single root 
 checkMultRoot(OPT,verbose=TRUE)

qle documentation built on May 2, 2019, 5:26 p.m.