#shape always predicted first (on centered series, no scaling taken into account),
#with side-effect: optimize some parameters (h, weights, ...)
predicted_shape = shape_forecaster$predict(today, memory, horizon, ...)
#shape always predicted first (on centered series, no scaling taken into account),
#with side-effect: optimize some parameters (h, weights, ...)
predicted_shape = shape_forecaster$predict(today, memory, horizon, ...)