mape,Forecast-method {lmForc}

Calculate MAPE of a Forecast object

Description

mape takes a Forecast object and returns the MAPE of the forecast. MAPE is calculated as: 1/length(forecast) * sum(abs(realized - forecast) / realized)

Usage

## S4 method for signature 'Forecast'
mape(Forecast)

Arguments

Forecast

Forecast object.

Value

MAPE value.

Examples

my_forecast <- Forecast(
  origin   = as.Date(c("2010-03-31", "2010-06-30", "2010-09-30", "2010-12-31")),
  future   = as.Date(c("2011-03-31", "2011-06-30", "2011-09-30", "2011-12-31")),
  forecast = c(4.21, 4.27, 5.32, 5.11),
  realized = c(4.40, 4.45, 4.87, 4.77),
  h_ahead  = 4L
)

mape(my_forecast)