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

I have data with 3 variables X,Y,Z and i want to fit a model like ...
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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ms
Super User ms
Super User

Re: Curve fitting on Data with three variable X,Y,Z

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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3 REPLIES 3
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ms
Super User ms
Super User

Re: Curve fitting on Data with three variable X,Y,Z

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".

View solution in original post

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Re: Curve fitting on Data with three variable X,Y,Z

Is there a way to determine the resulting formula? Will this same setup work for surface fitting?
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Re: Curve fitting on Data with three variable X,Y,Z

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