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?

I guess that barchart() will coerce Purchase to be a factor with
levels '1' to '10'. So make it a factor with your choice of
levels:

PurchaseF <- factor(Purchase, levels = 0:10)

(or use the scales= argument in barchart())

  -Peter Ehlers

Best,
Robert  

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Peter Ehlers
University of Calgary
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