src/test/scripts/functions/rewrite/RewriteSimplifyWeightedSquaredLoss.R

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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
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args <- commandArgs(TRUE)

# Set options for numeric precision
options(digits=22)

# Load required libraries
library("Matrix")
library("matrixStats")

# Read matrices and type
X = as.matrix(readMM(paste(args[1], "X.mtx", sep="")))
U = as.matrix(readMM(paste(args[1], "U.mtx", sep="")))
V = as.matrix(readMM(paste(args[1], "V.mtx", sep="")))
W = as.matrix(readMM(paste(args[1], "W.mtx", sep="")))
type = as.integer(args[2])


# Perform  operations
if(type == 1) {
    R = sum(W * (X - U %*% t(V))^2)
} else if(type == 2) {
    R = sum(W * (U %*% t(V) - X)^2)
} else if(type == 3){
    R = sum((X - W * (U %*% t(V)))^2)
} else if(type == 4){
    R = sum((W * (U %*% t(V)) - X)^2)
} else if(type == 5){
    R = sum((X - (U %*% t(V)))^2)
} else if(type == 6){
    R = sum(((U %*% t(V)) - X)^2)
}

# Write the result R
write(R, paste(args[3], "R" ,sep=""))