MAPE {simts}

Median Absolute Prediction Error

Description

This function calculates Median Absolute Prediction Error (MAPE), which assesses the prediction performance with respect to point forecasts of a given model. It is calculated based on one-step ahead prediction and reforecasting.

Usage

MAPE(model, Xt, start = 0.8, plot = TRUE)

Arguments

model

A time series model.

Xt

A vector of time series data.

start

A numeric indicating the starting proportion of the data that is used for prediction.

plot

A boolean indicating whether a model accuracy plot based on MAPE is returned or not.

Value

The MAPE calculated based on one-step ahead prediction and reforecasting is returned along with its standard deviation.

Author(s)

Stéphane Guerrier and Yuming Zhang