D2toG {dbstats}

R Documentation

Distance conversion: D2 to G

Description

Converts D2 class object into Gram class object.

Usage

  D2toG(D2,weights)

Arguments

D2	D2 object. Squared distances matrix between individuals.
weights	an optional numeric vector of weights. By default all individuals have the same weight.

Value

An object of class Gram containing the Doubly centered inner product matrix of D2.

Author(s)

Boj, Eva <evaboj@ub.edu>, Caballe, Adria <adria.caballe@upc.edu>, Delicado, Pedro <pedro.delicado@upc.edu> and Fortiana, Josep <fortiana@ub.edu>

See Also

GtoD2
disttoD2
D2toDist

Examples

X <- matrix(rnorm(100*3),nrow=100)
D2 <- as.matrix(dist(X)^2)
class(D2) <- "D2"
G <- D2toG(D2,weights=NULL)

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