R help - Dec 2004 - Different graph type can coexisti??

Please consider a data frame

A	B	C	D
1	4	5	0
2	3	2	75
3	4	1	84
4	5	1	90
5	3	0	100

Is there a way to plot column B and C as barplot *and* D as line on the same
graph??

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Landini Massimiliano wrote:
>Please consider a data frame
>
>A	B	C	D
>1	4	5	0
>2	3	2	75
>3	4	1	84
>4	5	1	90
>5	3	0	100
>
>Is there a way to plot column B and C as barplot *and* D as line on the same
>graph??
>
>  
>
It's not totally clear to me how you want to plot B and C, but the 
following code, and ?barplot should get you what you want:

Bars=matrix(cbind(B,C), nrow=2, byrow=T)

PLOT=barplot(Bars, ylim=c(0,100))
lines(PLOT,D, col=2)
axis(1)

The only tricky thing is dealing with the way R scales the x-axis, but 
fortunately the function barplot() returns the mid-points: hence this 
construction.

Bob

-- 
Bob O'Hara
Department of Mathematics and Statistics
P.O. Box 68 (Gustaf H??llstr??min katu 2b)
FIN-00014 University of Helsinki
Finland

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