On Nov 9, 2009, at 8:43 PM, Peng Yu wrote: > Chambers' book Statistical Models in S mentioned 'column.prods()'. But > I don't find it in R. I'm wondering if there is an equivalent in R? ??rowProds ??colProds (They are in both fUtilities and timeSeries.) -- David Winsemius, MD Heritage Laboratories West Hartford, CT