Symmetric mean absolute percentage error (difference) between series.
Computes the mean of the symmetric absolute percentage difference between x and y.
Syntax: @smape(x, y, [s])
x: series
y: series
s: (optional) sample string or object
Return: number
EViews will use the current or specified workfile sample.
Examples
Let yf denote in-sample forecasts for the series y. Then
= @smape(yf, y)
returns the SMAPE between the series y and its forecast.
Cross-references
