Perform crossvalidation through matlab.

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Sharda
Sharda 2015-2-6
I have performed polynomial regression on a data set.Now I want to use validation approach to characterize the goodness of fit for polynomials of different order and also distinguish between over fitting, under fitting and best fit. Can I use the 'crossval' function for this purpose.Plz help me write the code.I am new to this !!

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