dbstats (version 2.0.2)

D2toG: Distance conversion: D2 to G

Description

Converts D2 class object into Gram class object.

Usage

D2toG(D2,weights)

Value

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

Arguments

D2

D2 object. Squared distances matrix between individuals.

weights

an optional numeric vector of weights. By default all individuals have the same weight.

Author

Boj, Eva <[e-mail]>, Caballe, Adria <[e-mail]>, Delicado, Pedro <[e-mail]> and Fortiana, Josep <[e-mail]>

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)