As of Version 7.0, PartialSumOfSquares has become a property of LinearModelFit.
- To use PartialSumOfSquares, you first need to load the Regression Common Functions Package. You can do this by using Needs["LinearRegression`"], which will automatically load the Regression Common Functions Package, or you can load the package directly by using Needs["RegressionCommon`"].
- PartialSumOfSquares is useful for trimming a large set of predictors.
- Basis functions yielding a small value for the partial sum of squares have less influence on the fit.