Regression subset selection

leaps	all-subsets regressiom
leaps.backward	Internal functions for leaps(), subsets()
leaps.exhaustive	Internal functions for leaps(), subsets()
leaps.forward	Internal functions for leaps(), subsets()
leaps.seqrep	Internal functions for leaps(), subsets()
leaps.setup	Internal functions for leaps(), subsets()
plot.subsets	Graphical table of best subsets
subsets	functions for subset selection
summary.subsets	functions for subset selection