Extract Log-Likelihood for a drift_dm Object

This method extracts the log-likelihood for a drift_dm object if possible.

Usage

# S3 method for class 'drift_dm'
logLik(object, ...)

Arguments

object

a drift_dm object containing observed data

...

additional arguments

Value

A logLik object containing the log-likelihood value for the drift_dm object. This value has attributes for the number of observations (nobs) and the number of model parameters (df).

Returns NULL if the log-likelihood is not available (e.g., when the model has no observed data attached).

Examples

# get a pre-built model and a data set for demonstration purpose
# (when creating the model, set the discretization to reasonable values)
a_model <- dmc_dm(t_max = 1.5, dx = .01, dt = .005)
obs_data(a_model) <- dmc_synth_data
logLik(a_model)
#> 'log Lik.' 124.996 (df=7)