As of Version 7.0, BestFitParameterDelta has been renamed to "BetaDifferences" and has become a property of LinearModelFit.
- To use BestFitParametersDelta, 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`"].
- BestFitParametersDelta gives a list of values which measure the effect of removing a data point on the fitted parameters.
- The i element in the list measures the effect of removing the i element of the dataset.
- BestFitParametersDelta is also referred to as DFBETAS.