forecast_from

The timestep index where the forecast starts, as set by the dashboard's time slider (Forecast from) — or () when there is no cutoff. Available in every formula and act method. Use it to show actual figures before the cutoff and simulated values from it on.

forecast_from() : integer or ()

let f = forecast_from();
if f == () || __timestep < f {
    agent.get_prop("actual_revenue")      // history: the real figures
} else {
    agent.get_prop("revenue", -1) * 1.02  // forecast: grow 2% per step
}