A generic function for estimating the initial parameters for estimation as part
of the pscfti.R function. Parameter estimates are obtained using standard
optomisation methods provided by the 'optim' set of functions. For a single
parameter a Brent method is applied. For mutliple treatment comparisons the
'BFGS' method is applied.
Usage
initParm(CFM, DC_clean, trt)
Arguments
- CFM
A counter-factual model
- DC_clean
a cleaned dataset obsect obtained using dataComb.flexsurvreg
- trt
An optional additional vector denoting treatment allocations for multiple treatment comparisons. Defaults to 'NULL'
Value
an 'optim' output giving the parameter values to be supplied as a
starting value for the mcmc routine.
Details
This function takes the liklihood for a 'flexsurvreg' model and uses 'optim'
to fit the likelihood.