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We consider several factors when looking for what ideas to add to JMP. This includes what will have the greatest benefit to our customers based on scope, needs and current resources. Product ideas help us decide what features to work on next. Additionally, we often look to ideas for inspiration on how to add value to developments already in our pipeline or enhancements to new or existing features.

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0 Kudos

Show equivalent degrees of freedom in smoothing spline summary

Status: New Submitted by on ‎03-13-2023 12:32 PM
Comment

The current summary of a smoothing spline shows the lambda parameter which is hard to connect to the smoothness of the fit when introducing this methodology.

 

To offer a more interpretable measure of the smoothing spline, the output could add the trace of the projection matrix, aka, the equivalent degrees of freedom (EDF).  With the EDF, it would then be simpler to contrast the fit of a smoothing spline to, for example, the fit of a polynomial with an equal number of parameters.  The EDF is a component of the output for a smoothing spline in R.