bicenter.wt: Double Weighted Centring

In ade4: Analysis of Ecological Data : Exploratory and Euclidean Methods in Environmental Sciences

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)

Example output

     [,1] [,2]
[1,]    0    0
[2,]    0    0
[3,]    0    0
[1] 2.307418e-29

ade4 documentation built on May 2, 2019, 5:50 p.m.