prepare_stan_data_symmetric: Prepare data for symmetric threshold Stan model

In clmstan: Cumulative Link Models with 'CmdStanR'

Prepare data for symmetric threshold Stan model

Description

Creates a Stan data list for cumulative link models with symmetric thresholds centered at 0: c[k] = -c[K-k]

Usage

prepare_stan_data_symmetric(
  formula,
  data,
  link = "logit",
  link_param = NULL,
  prior_beta_sd = 2.5,
  prior_cpos_sd = 5
)

Arguments

formula	A formula specifying the model
data	A data frame containing the variables
link	Link function name
link_param	A list of link parameters (for flexible links)
prior_beta_sd	Prior SD for regression coefficients (default: 2.5)
prior_cpos_sd	Prior SD for positive thresholds (default: 5)

Details

Examples:

• K=4 (3 thresholds): c = (-a, 0, a)

• K=5 (4 thresholds): c = (-b, -a, a, b)

• K=6 (5 thresholds): c = (-b, -a, 0, a, b)

Value

A list suitable for passing to CmdStan (clm_symmetric.stan)

clmstan documentation built on June 29, 2026, 5:06 p.m.