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st: graph bar & colour

From   "Allan Reese (Cefas)" <[email protected]>
To   <[email protected]>
Subject   st: graph bar & colour
Date   Wed, 19 Jan 2011 17:48:53 -0000

I've been drawing a clustered barchart and found a curious comment in
the [G] Manual: "asyvars is seldom specified".

It's curious because this seemed the most obvious way to get coloured
bars to distinguish groups.

   graph bar (count) x, over(gvar1) over(gvar2)

gave the shape of the graph, but all bars are the same colour.  We could
have -separate-d x into the gvar1 groups, but easier to

   graph bar (count) x, over(gvar1) asyvar over(gvar2) 

The spacing can then be adjusted using -gap- or -bargap-

   graph bar (count) x, over(gvar1, gap(5)) asyvar bar(1, col(orange))
... over(gvar2)

Another curiosity: the command allows choice of -color- for each bar but
only an overall -intensity-.


R Allan Reese
Senior statistician, Cefas
The Nothe, Weymouth DT4 8UB 

Tel: +44 (0)1305 206614 -direct
Fax: +44 (0)1305 206601 

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