toMatrix: Converts 3d array of CATA data to a tall 2d matrix format

In cata: Analysis of Check-All-that-Apply (CATA) Data

Converts 3d array of CATA data to a tall 2d matrix format

Description

Converts a three-dimensional array (I assessors, J products, M attributes) to a two-dimensional matrix with (I assessors, J products) rows and (M attributes) columns, optionally preceded by two columns of row headers.

Usage

toMatrix(X, header.rows = TRUE, oneI = FALSE, oneM = FALSE)

Arguments

X	three-dimensional array (I assessors, J products, M attributes) where values are 0 (not checked) or 1 (checked)
header.rows	TRUE (default) includes row headers; set to FALSE to exclude these headers
oneI	indicates whether calculation is for one assessor (default: FALSE)
oneM	indicates whether calculation is for one attribute (default: FALSE)

Value

A matrix with I assessors \times J products in rows and M attributes in columns (preceded by 2 columns) of headers if header.rows = TRUE

Examples

# convert CATA results from the first 8 consumers and the first 4 attributes
# to a tall matrix
toMatrix(bread$cata[1:8,,1:4])

cata documentation built on Sept. 12, 2025, 1:08 a.m.