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- Curve fitting on Data with three variable X,Y,Z

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Jun 22, 2009 2:24 PM
(2076 views)

Y= a(x) + b(z)+c,

X and Z may have some powers (n) also.How to do it? Please guide

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Jun 23, 2009 5:22 AM
(3570 views)

Solution

Use the "Fit Model" platform. Add column Y to "Y" and columns X and Z to "Model Effects". To add powers of independent variables choose "Polynomial to Degree" under the "Macros" roll list. When you're done just hit "Run Model".

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Jun 23, 2009 5:22 AM
(3571 views)

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Aug 5, 2009 3:22 PM
(2022 views)

Is there a way to determine the resulting formula? Will this same setup work for surface fitting?

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Aug 10, 2009 6:30 AM
(2022 views)

Under the top red triangle, under Save Columns, you can select Prediction Formula option.