R help - Aug 2006 - More Plots

Hi,

How can we plot two graphs ex. lets say correlation & ratio in the same 
window?

I mean in the window I have :

1. Graph of correlation having X & Y axes

2. Graph of ratio having A & B axes

one above the other.

Thanks,
Sonal

sonal at deepfoo.com a ?crit :
> Hi,
>
> How can we plot two graphs ex. lets say correlation & ratio in the same
> window?
>
> I mean in the window I have :
>
> 1. Graph of correlation having X & Y axes
>
> 2. Graph of ratio having A & B axes
>
> one above the other.
>
> Thanks,
> Sonal
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>   
Hi,
you can simply do that using the command par(new=TRUE) between your two 
graphs.
example :
x<-rnorm(100,0,2)
y<-2*x+rnorm(100,0,2)
plot(y~x)
par(new=TRUE)
z<-rnorm(100,10,2)
plot(z,col='red')

As you can notice the second plot is roughly added to the new one, even 
if the scales are different. So you basically have to specify the axes 
of the second plot, using the axis() command (after specifying xaxt='n' 
and yaxt='n' in the second plot for removing its axes).


Tristan

--- sonal at deepfoo.com wrote:
> Hi,
> 
> How can we plot two graphs ex. lets say correlation
> & ratio in the same 
> window?
> 
> I mean in the window I have :
> 
> 1. Graph of correlation having X & Y axes
> 
> 2. Graph of ratio having A & B axes
> 
> one above the other.
> 
> Thanks,
> Sonal

?par
and have a look at mfcol or mfrow.

Example

a <- c(1:5)
b <- c(11:15)
x <- c(21:30)
y <- c(31:40)

par(mfcol=c(2,1))
plot(a,b)
plot (x,y)

> How can we plot two graphs ex. lets say correlation & ratio in the same
> window?
>
> I mean in the window I have :
>
> 1. Graph of correlation having X & Y axes
>
> 2. Graph of ratio having A & B axes
>
> one above the other.

Why do you want to do this?  It is not a good idea unless you are
trying to confusing or mislead people.

Hadey