MSBVAR (version 0.9-2)

mae: Mean absolute error of VAR forecasts

Description

Computes the mean absolute error of VAR forecasts

Usage

mae(m1, m2)

Arguments

m1

$nstep x m$ matrix of VAR forecasts

m2

$nstep x m$ matrix of VAR forecasts or true values

Value

MAE value

Details

Computes the mean absolute error (MAE) across a series of VAR forecasts.

See Also

cf.forecasts, rmse

Examples

data(IsraelPalestineConflict)
Y.sample1 <- window(IsraelPalestineConflict, end=c(2002, 52))
Y.sample2 <- window(IsraelPalestineConflict, start=c(2003,1))

# Fit a BVAR model
fit.bvar <- szbvar(Y.sample1, p=6, lambda0=0.6, lambda1=0.1, lambda3=2,
                   lambda4=0.25, lambda5=0, mu5=0, mu6=0, prior=0)

# Forecast -- this gives back the sample PLUS the forecasts!

forecasts <- forecast(fit.bvar, nsteps=nrow(Y.sample2))

# Compare forecasts to real data
mae(forecasts[(nrow(Y.sample1)+1):nrow(forecasts),], Y.sample2)