Dimensionality: Dimensionality

In exametrika: Test Theory Analysis and Biclustering

Dimensionality

Description

The dimensionality is the number of components the test is measuring.

Usage

Dimensionality(U, na = NULL, Z = NULL, w = NULL)

## Default S3 method:
Dimensionality(U, na = NULL, Z = NULL, w = NULL)

## S3 method for class 'binary'
Dimensionality(U, na = NULL, Z = NULL, w = NULL)

## S3 method for class 'rated'
Dimensionality(U, na = NULL, Z = NULL, w = NULL)

## S3 method for class 'ordinal'
Dimensionality(U, na = NULL, Z = NULL, w = NULL)

Arguments

U	Either an object of class "exametrika" or raw data. When raw data is given, it is converted to the exametrika class with the dataFormat function.
na	Values to be treated as missing values.
Z	Missing indicator matrix of type matrix or data.frame. Values of 1 indicate observed responses, while 0 indicates missing data.
w	Item weight vector specifying the relative importance of each item.

Value

Returns a list of class c("exametrika", "Dimensionality") containing:

Component

Sequence of component numbers

Eigenvalue

Eigenvalues of the tetrachoric correlation matrix

PerOfVar

Percentage of variance explained by each component

CumOfPer

Cumulative percentage of variance explained

exametrika documentation built on Aug. 21, 2025, 5:27 p.m.