nobs: S3 Methods: nobs

In ForceChoice: Forced-Choice Modeling Based on Item Response Theory and Cognitive Diagnostic Models

S3 Methods: nobs

Description

Extracts the number of observations (persons) from a fitted ForceChoice model object. Returns the number of rows in the response matrix used for model fitting.

Usage

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

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

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

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

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

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

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

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

Arguments

object	A fitted model object.
...	Additional arguments (currently ignored).

Value

An integer: the sample size N.

Methods (by class)

• nobs(MIRT): Number of observations (persons) for MIRT objects.

• nobs(MGPCM): Number of observations for MGPCM objects.

• nobs(MGGUM): Number of observations for MGGUM objects.

• nobs(FCMIRT): Number of observations for FCMIRT objects.

• nobs(FCDCM): Number of observations for FCDCM objects.

• nobs(FCGDINA): Number of observations for FCGDINA objects.

• nobs(FCGGUM): Number of observations for FCGGUM objects.

• nobs(TIRT): Number of observations for TIRT objects.

ForceChoice documentation built on Sept. 13, 2026, 1:06 a.m.