Data Smoothing: Thin-Plate Spline: Data Smoothing: Thin-Plate Spline

Data Smoothing: Thin-Plate Spline

The Thin-Plate Spline analysis is intended for scatter plot smoothing. The Thin-Plate Spline analysis uses a penalized least squares method to fit a nonparametric regression model. You can use the generalized cross validation (GCV) function to select the amount of smoothing.

You can run the Thin-Plate Spline analysis by selecting Analysis $\blacktriangleright\,$ Data Smoothing $\blacktriangleright\,$ Thin-Plate Spline from the main menu. The computation of the fitted spline function, confidence limits, and related statistics is implemented by calling the TPSPLINE procedure in SAS/STAT. See the TPSPLINE procedure documentation in the SAS/STAT User's Guide for additional details.

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Data Smoothing: Thin-Plate Spline

Example

Specifying the Thin-Plate Spline Analysis

Analysis of Selected Variables