# NOTE: if predict_at does not cut days at midnight,
# for the exogenous to be synchronized they need to be shifted
if (predict_at > 0)
{
exo_hat = as.data.frame(exo_df[max(1,i-1),(1+nb_exos+1):(1+2*nb_exos)])
# NOTE: if predict_at does not cut days at midnight,
# for the exogenous to be synchronized they need to be shifted
if (predict_at > 0)
{
exo_hat = as.data.frame(exo_df[max(1,i-1),(1+nb_exos+1):(1+2*nb_exos)])
centered_serie = serie - level
# data$append(time, centered_serie, level, exo_hat, exo_Jm1) #TODO: slow: why ?
data[[length(data)+1]] = list("time"=time, "serie"=centered_serie, "level"=level,
centered_serie = serie - level
# data$append(time, centered_serie, level, exo_hat, exo_Jm1) #TODO: slow: why ?
data[[length(data)+1]] = list("time"=time, "serie"=centered_serie, "level"=level,