calcWeights {ACCLMA}R Documentation

Calculates the relative weight of each observation

Description

This function receives a matrix after the averageSameXs function has been used on it and calculates the relative weight of each observation by dividing its weight by the total weights. If at least one observation doesn't have a weight specified the function assumes all the observations are of equal weight

Usage

calcWeights(mat)

Arguments

mat

a matrix after the averageSameXs function has been used on it

Value

A matrix with the updated weights column

Author(s)

Tal Carmi, Liat Gaziel

Examples

d <- c(1,1,3,4)
e <- c(5,6,7,8)
f <- c(1,1,1,1)
mydata <- data.frame(d,e,f)
names(mydata) <- c("X","Y","Weight")
mydata<-averageSameXs(mydata)
calcWeights(mydata)

## The function is currently defined as
function (mat) 
{
    n <- size(mat)
    zeroWeight <- 0
    sumWeight <- 0
    for (i in 1:n) {
        if (is.null(mat[i, 3]) || is.na(mat[i, 3]) || mat[i, 
            3] == 0) {
            zeroWeight <- 1
        }
        sumWeight <- sumWeight + mat[i, 3]
    }
    if (zeroWeight == 1) {
        mat[3] = 1/n
        return(mat)
    }
    for (i in 1:n) {
        mat[i, 3] <- mat[i, 3]/sumWeight
    }
    return(mat)
  }

[Package ACCLMA version 1.0 Index]