Recent content by tomekki

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    How do I turn the n-ahead ARIMA predictions to undifferenced values?

    Hello everyone, I`m doing a Monthly sales forecast based on some historical data. My question is when I do the Arima(p,d,q) and then I do forecast(arima_model) in order to get the fitted values, which are nicely following the historical data points, then If I take the mean values from the...