inertia_calc {monoClust}

Cluster Inertia Calculation

Description

Calculate inertia for a given subset of the distance matrix from the original data set provided to x. Assumes that distance matrices are stored as matrices and not distance objects.

Usage

inertia_calc(x)

Arguments

x

Distance matrix, not an object of some distance measure.

Value

Inertia value of the matrix, formula in Chavent (1998). If x is a single number, return 0.

Examples

data(iris)

# Euclidean distance on first 20 rows of the 4 continuous variables
dist_mat <- as.matrix(dist(iris[1:20, 1:4]))
inertia_calc(dist_mat)