Prof Brian Ripley wrote: > On Tue, 6 Jan 2009, Petr PIKAL wrote: > > [...] > >> Logical vectors can be treated like numeric with TRUE=1 and FALSE=0, > > More accurately, 'like integer' ('numeric' often means 'double'). > why would this be more accurate? is(TRUE+0) # numeric, not integer is.integer(TRUE+0) # FALSE vQ