On Apr 24, 2009, at 9:23 PM, Qifei Zhu wrote:
I used dotplot to draw a graph for a dataset with size of 100. Since the x-axis are all texts, so they are mixed up and not readable. Is there any way to make it readable or how can I add labels to all the points with its
(x,y) coordinates? Thanks for your help.

Look up information on the scales parameter and rotate your label text:

dotplot(decrease ~ treatment, OrchardSprays, groups = rowpos, scales=list(x=list(rot=60, labels=c("AAAA","","","DDDD","","FFFF","","") )))

David Winsemius, MD
Heritage Laboratories
West Hartford, CT

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