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Why the lambda value of Spline fitting used in "Fit Y by X analysis" is different from the "Graph Builder"?
Created:
Sep 16, 2021 09:35 PM
| Last Modified: Jun 11, 2023 07:17 AM(790 views)
Hello, JMP developers,
I'm using JMP15.2.1 version.
As below smooth fitting results(same datasets) in JMP when using the One Way Analysis (Fit Y by X) platform vs. Graph Builder, by setting the same lambda=100, the smoothness of the curve is totally different. (Fits are the same even if the lambda values differ by approximately 20x)
The graph builder uses standardized X variables. To get the same line in Bivariate, choose 'Other...' under the Red Triangle > Flexible > Fit Spline, use a lamda of 0.05 (default in graph builder) and check 'Standardize X'.