R help - Jun 2006 - superimposing histograms

I want to superimpose histograms from three populations onto the same graph,
changing the shading of the bars for each population.  After consulting the
help files and the archives I cannot find out how to do this (seemly) simple
graph.  To be clear, I want
 
- a single x axis (from -3 to 18)
- three groups of bars forming the histograms of each population (they will
not overlap much, but this is a detail)
- the bars from each histogram having different shadings or other visually
distinguishing features.
 
Can anyone explain how to do this?
 
Thanks.
 

Bill Shipley

 

 

	[[alternative HTML version deleted]]

See:

http://www.medepi.net/data/wnv/index.html

On 6/28/06, Bill Shipley <bill.shipley at usherbrooke.ca>
wrote:
> I want to superimpose histograms from three populations onto the same
graph,
> changing the shading of the bars for each population.  After consulting the
> help files and the archives I cannot find out how to do this (seemly)
simple
> graph.  To be clear, I want
>
> - a single x axis (from -3 to 18)
> - three groups of bars forming the histograms of each population (they will
> not overlap much, but this is a detail)
> - the bars from each histogram having different shadings or other visually
> distinguishing features.
>
> Can anyone explain how to do this?
>
> Thanks.
>
>
> Bill Shipley
>
>
>
>
>
>        [[alternative HTML version deleted]]
>
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