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Predicting or forecasting future based on past data

Posted 10 years ago
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Can someone direct me on how to take last thiry years of certain data and predict the next twenty years of data in mathematica?
POSTED BY: jas029 Sirman
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Working through this examples should give you a good starting point:
POSTED BY: Sam Carrettie
People are used to call this extrapolation, it has nothing to do with prediction: One fits the data of the last thirty years to some reasonable model and evaluates the model afterwards outside of the given data range (to the next twenty years). So, how would you call it? It's speculation, extrapolation, fiddling with the unknown. It would  not be speculation if and only if the data must follow the model, i.e. if the model would in fact represent a law. But in order to constitute a law the data must be reproducible and nobody can reproduce the last thirty years. 
POSTED BY: Udo Krause
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