Description Usage Arguments Value Author(s) Examples
The function unifies all the observations with the same X values into one obseravtion with regard to the weights of each observation
1 | averageSameXs(mat)
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mat |
A matrix containing the X,Y,Weight columns after the calcWeights function been used on it |
Data set with only row for each X value
Tal Carmi, Liat Gaziel
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | 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")
averageSameXs(mydata)
## The function is currently defined as
function (mat)
{
n <- size(mat)
temp <- matrix(NA, nrow = n, ncol = 3)
line <- 1
i <- 1
while (i <= n) {
j <- i
sumY <- 0
sumWeights <- 0
while (j <= n & mat[i, 1] == mat[j, 1]) {
sumY <- sumY + mat[j, 2] * mat[j, 3]
sumWeights <- sumWeights + mat[j, 3]
j <- j + 1
}
temp[line, 1] <- mat[i, 1]
temp[line, 2] <- sumY/sumWeights
temp[line, 3] <- sumWeights
line <- line + 1
i <- j
}
temp <- as.data.frame(temp[1:(line - 1), ])
names(temp)[1] = "X"
names(temp)[2] = "Y"
names(temp)[3] = "Weights"
return(temp)
}
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