[R] Is there anyway to clip the bottom of a barplot?

[Arthur Roberts]

Hi, all,

I need to show only values in a barplot from say 4-12.  When I do  
this, values below 4 are not cutoff.  I would appreciate any input  
into how I could cut the bottom part of the bar off.

Best wishes,
Art Roberts
University of Washington
Department of Medicinal Chemistry