smape: Compute Symmetric Mean Absolute Percentage Error (SMAPE)
Description
SMAPE is computed as \(mean(abs(forecast - validation) / ((abs(forecast) + abs(validation)) / 2))\).
Usage
smape(forecast, validation)
Arguments
forecast
A numeric vector of forecasted values
validation
A numeric vector of actual (real) values
Value
A Symmetric Mean Absolute Percentage Error (SMAPE)