proximity
Proximity matrix for data in ensemble of decision trees
Syntax
prox = proximity(B,X)
Description
prox = proximity(B,X)
computes a numeric
matrix of size Nobs
-by-Nobs
of
proximities for data X
, where Nobs
is
the number of observations (rows) in X
. Proximity
between any two observations in the input data is defined as a fraction
of trees in the ensemble B
for which these two
observations land on the same leaf. This is a symmetric matrix with
ones on the diagonal and off-diagonal elements ranging from 0 to 1.