chickn (version 1.2.3)

DBindex_BIG: DBindex_BIG

Description

Davies Bouldin index computation

Usage

DBindex_BIG(
  X_cumsum,
  rowInd,
  Clusters,
  C,
  C_cumsum,
  cluster_size,
  DistInter,
  R
)

Arguments

X_cumsum

is a Filebacked data cummulative sum matrix n x N

rowInd

is a vector of the row indeces

Clusters

is a list of cluster assignment

C

is a matrix of the cluster centroids

C_cumsum

is a matrix of the cummulative sums of cluster centroids

cluster_size

is a vector of the cluster sizes

DistInter

is a matrix of the inter distances

R

is a matrix of the intra distances

Value

A value of the DB index