Menu interface to the Best Subsets Regression function.
  Selection boxes allow one response variables and one or more predictor
  variables.  All subsets are calculated.  Only the best $k$, where $k$
  is menu item, are displayed.  A graph displaying one of the following
  statistics ($R^2$, residual sum of squares, adjusted $R^2$, $C_p$,
  BIC, $s$) is displayed.  The model with highest adjusted $R^2$ is made the
  active model and its summary is displayed.
bestSubsetsRegressionModel.HH()Richard M. Heiberger <rmh@temple.edu>
regsubsets