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# Leaning Mathematical Function

Ghostrider
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**60**Contributor II
Say I have a set of values that describe the function f(x,y)=z. What would be the best learning algorithm for predicting other values of the function values (not necessarily learning the function's expression)? I guess basically this is a multi-variable regression problem.

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## Answers

347MavenHave fun trying them out.

29Contributor IIMy thought was that the regression may be optimal when consdering a more localized view of he data rather than considering all training data at once- maybe it will more quickly approach a good estimate of the real value this way. Try looking at various portions of the data for the regresson, ie. 'window' the data into different sized test sets. This may be a bit like creating a movig average or differeniation in learning. What are everyone's thoughts on this?