Create trial-level parameter values — build_param_matrix • AccumulatR

This expands a named parameter vector into the trial-by-trial format expected by `simulate()` and `log_likelihood()`.

Usage

build_param_matrix(
  model,
  param_values,
  n_trials = 1L,
  component = NULL,
  trial_df = NULL,
  layout = NULL
)

Arguments

model: Model definition.
param_values: Named numeric vector of parameter values.
n_trials: Number of trials to generate.
component: Optional component label or labels.
trial_df: Optional trial/prepared data object. If it includes an `accumulator` column, parameter rows are built in that exact row order.
layout: Optional storage layout.

Value

A data frame or matrix of parameter values by trial.

Examples

spec <- race_spec()
spec <- add_accumulator(spec, "A", "lognormal")
spec <- add_outcome(spec, "A_win", "A")
vals <- c(A.m = 0, A.s = 0.1, A.q = 0, A.t0 = 0)
build_param_matrix(spec, vals, n_trials = 2)
#>      q w t0 p1  p2 p3
#> [1,] 0 1  0  0 0.1  0
#> [2,] 0 1  0  0 0.1  0