spaMM (version 4.6.1)

get_inits_from_fit: Initiate a fit from another fit

Description

get_inits_from_fit is an extractor of some fitted values from a fit in a convenient format to initiate a next fit.

Usage

get_inits_from_fit(from, template = NULL, to_fn = NULL, inner_lambdas=FALSE)

Value

A list with elements

init, init.corrHLfit

(depending on the fitting function) giving initial values for outer-optimization;

init.HLfit

giving initial values for the iterative algorithms in HLfit. It is itself a list with possible elements:

fixef

for the coefficients of the linear predictor, adjusted to the format of the coefficients of the linear predictor of the template object, if available;

ranCoefs

random-coefficients parameters (if not outer-optimized).

Undocumented attributes may be attached, and some of the parameters may be transformed.

Arguments

from

Fit object (inheriting from class "HLfit") from which fitted values are taken.

template

Another fit object. Usage with a template fit object is suitable for refitting this object using fitted values from the from object as starting values.

to_fn

NULL or character: the name of the function to be used the next fit. If NULL, taken from template (if available), else from from. It is meaningful to provide a to_fn distinct from the function used to fit a template.

inner_lambdas

Boolean; Whether the output should include estimates of the dispersion parameters estimated by the iterative methods implemented in HLfit.

See Also

get_ranPars and VarCorr.

Examples

if (FALSE) {
data("blackcap")
(corrhlfit <- corrHLfit(migStatus ~ means+ Matern(1|longitude+latitude),data=blackcap,
                        method="ML")) 
inits <- get_inits_from_fit(corrhlfit, to_fn = "fitme")                    
(fitfit <- fitme(migStatus ~ means+ Matern(1|longitude+latitude),data=blackcap, 
                  init=inits[["init"]])) 
inits <- get_inits_from_fit(corrhlfit, template = fitfit)                    
fitme(migStatus ~ means+ Matern(1|longitude+latitude),data=blackcap, 
      init=inits[["init"]])
# In these examples, inits$init.HLfit is useless 
# as it is ignored when LMMs are fitted by fitme().
}