R help - Jan 2010 - lattice and probem

I have a simple chart:
   barchart(Counts ~ Purchase | Products , data = my.data, groups = Model)
where Purchase in data has values {0,1,2,3...10}. In a chart xlab begins with 1
not 0. How to change it?

Best,
Robert

I have a simple chart:
   barchart(Counts ~ Purchase | Products , data = my.data, groups = Model)
where Purchase in data has values {0,1,2,3...10}. In a chart xlab begins with 1
not 0. How to change it?

Best,
Robert