US_LM Model

# Cut-and-Paste Code Below into Window Above and Run

#

# US_LM Model 

#

merge.forecast <- function (fx,n=1) {

x <- splice(fx$pred,fx$forecast[[n]])

colnames(x) <- seriesNames(fx$data$output)

return(x)

}

AIC <- function(model) {informationTestsCalculations(model)[3]}

require(dse)

require(matlab)

#

# Measurement Matrix (Growth), (X-N), (L+XREAL-X-N)

# 

#           Q      N  HOURS XREAL      X      L

#[1,]  0.4124  0.403  0.413 0.410  0.399  0.412

#[2,] -0.1464 -0.580 -0.122 0.310  0.711 -0.160

#[3,] -0.0825 -0.546  0.137 0.358 -0.466  0.575

#

# Fraction of Variance 

#[1] 0.977 0.999 1.000 1.000 1.000 1.000

#

f <- matrix( c( 1.026261160, -0.04873236, 0.04995449,  0.166789178,

                      0.023195483,  1.01292512, 0.06694359,  0.004293523,

                     -0.002685722, -0.04074830, 1.04458649, -0.006797188,

0.00000000,  0.0000000,  0.0000000,  1.0000000000

),byrow=TRUE,nrow=4,ncol=4)

#

# To stabilize, Uncomment Next Line

# f[1,1] <- 0.99377254; f[2,2] <- 0.97301183; f[3,3] <- 1.00342561

#

#

h <- eye(3,4)

k <- (f[,1:3,drop=FALSE])

US_LM <- SS(F=f,H=h,K=k,z0=c( 0.33740965,  0.01205627, -0.01452034,  1.0000000000),

              output.names=c("US1","US2","US3"))

print(US_LM)

is.SS(US_LM)

stability(m <- SS(F=f[1:3,1:3,drop=FALSE],R=eye(3),Q=eye(3),H=eye(3)))

US_LM.data <- simulate(US_LM,sampleT=100,noise=matrix(0,100,3),start=1950)

US_LM.f <- forecast(l(US_LM,US_LM.data),horizon=100)

US_LM.fx <- merge.forecast(US_LM.f)

tfplot(US_LM.f)