extract_one_param: Extract a Single Parameter Estimate with SE and CI

In irtsim: Monte Carlo Simulation-Based Sample-Size Planning for Item Response Theory

Extract a Single Parameter Estimate with SE and CI

Description

Internal helper to extract estimate, standard error, and confidence interval bounds from a single column of a mirt coefficient matrix.

Usage

extract_one_param(mat, col_name)

Arguments

mat	A coefficient matrix from mirt::coef() with rows "par", "CI_2.5", "CI_97.5" and column names matching mirt's parameter naming.
col_name	Character string: the column name to extract (e.g., "a1", "d", "d2").

Value

A list with elements:

est

The parameter estimate (from "par" row).

se

The standard error derived from CI width, or NA if CI rows absent.

ci_lower

Lower CI bound (from "CI_2.5" row), or NA if absent.

ci_upper

Upper CI bound (from "CI_97.5" row), or NA if absent.

irtsim documentation built on April 24, 2026, 1:07 a.m.