bicenter.wt {ade4}R Documentation

Double Weighted Centring

Description

This function creates a doubly centred matrix.

Usage

bicenter.wt(X, row.wt = rep(1, nrow(X)), col.wt = rep(1, ncol(X)))

Arguments

X a matrix with n rows and p columns
row.wt a vector of positive or null weights of length n
col.wt a vector of positive or null weights of length p

Value

returns a doubly centred matrix

Author(s)

Daniel Chessel

Examples

w <- matrix(1:6, 3, 2)
bicenter.wt(w, c(0.2,0.6,0.2), c(0.3,0.7))

w <- matrix(1:20, 5, 4)
sum(bicenter.wt(w, runif(5), runif(4))^2)

Worked out examples


> library(ade4)
> ### Name: bicenter.wt
> ### Title: Double Weighted Centring
> ### Aliases: bicenter.wt
> ### Keywords: utilities
> 
> ### ** Examples
> 
> w <- matrix(1:6, 3, 2)
> bicenter.wt(w, c(0.2,0.6,0.2), c(0.3,0.7))
     [,1] [,2]
[1,]    0    0
[2,]    0    0
[3,]    0    0
> 
> w <- matrix(1:20, 5, 4)
> sum(bicenter.wt(w, runif(5), runif(4))^2)
[1] 1.81438e-29
> 
> 
> 
>
[Package ade4 Index]