Get the Number of Observations for a drift_dm Object

This method retrieves the total number of observations in the obs_data list of a drift_dm object.

Usage

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

Arguments

object: a drift_dm object, which contains the observed data in object$obs_data.
...: additional arguments

Value

An integer representing the total number of observations across all conditions in object$obs_data.

Details

The function iterates over each element in object$obs_data, counts the entries in each nested component, and returns the cumulative sum as the total observation count.

It was written to provide an nobs method for calculating the log-likelihood (logLik), AIC (stats::AIC), and BIC (stats::BIC) statistics for objects of type drift_dm.

Examples

# get a pre-built model and data set for demonstration purpose
a_model <- dmc_dm()
obs_data(a_model) <- dmc_synth_data

# then get the number of observations by accessing the model
nobs(a_model)
#> [1] 600

# same number of observations as in the original data set
nrow(dmc_synth_data)
#> [1] 600