Make forecasts from k historical cutoff points, working backwards from (end - horizon) with a spacing of period between each cutoff.
simulated_historical_forecasts(model, horizon, units, k, period = NULL)
Fitted Prophet model.
Integer size of the horizon
String unit of the horizon, e.g., "days", "secs".
integer number of forecast points
Integer amount of time between cutoff dates. Same units as horizon. If not provided, will use 0.5 * horizon.
A dataframe with the forecast, actual value, and cutoff date.