Skip to contents

Create Hypothesis RDM from Category Structure

category_rdm.Rd

Creates an RDM based on category membership, where items in the same category have high similarity and items in different categories have low similarity.

Usage

category_rdm(
  categories,
  within_category_sim = 0.8,
  between_category_sim = 0.2,
  as_dist = TRUE
)

Arguments

categories

A named vector or factor where names/levels are labels and values are category assignments

within_category_sim

Similarity value for items within the same category (default: 0.8)

between_category_sim

Similarity value for items in different categories (default: 0.2)

as_dist

Logical; if TRUE return a dist object, otherwise return matrix (default: TRUE)

Value

A dist object or matrix representing the category-based RDM

Examples

# Create category structure
categories <- c(cat = "animal", dog = "animal", bird = "animal",
               car = "vehicle", plane = "vehicle", boat = "vehicle")

# Create category-based RDM
rdm <- category_rdm(categories)

# Custom similarity values
rdm <- category_rdm(categories, 
                   within_category_sim = 0.9,
                   between_category_sim = 0.1)