R help - Dec 2009 - draw a box at 10% lower and upper in scatter plot

Hi,
 
I would like to draw a box at each corner of lower 10% and upper 10% in the
scatter plot on(0,1)*(0,1)  to indicate the lower and upper tail.  I hope
somebody can help me.
 
Here is my code:
## scatter plot
plot(hume_uni[,2],beec_uni[,2], pch=19, xlab="Hume_uni",
ylab="Beec_uni", col= "blue") 
title(main="Scatter plot of uniformised data of Hume and Beechworth",
font.main= 4)
abline(lm(hume_uni[,2]~beec_uni[,2]), col= "red").
 
Thank you so much fro any help given.




      
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Tena koe Roslina

Check:

?rect
?quantile

Perhaps those two functions will give you what you want.

HTH ....

Peter Alspach
> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Roslina Zakaria
> Sent: Wednesday, 2 December 2009 12:24 p.m.
> To: r-help at r-project.org
> Subject: [R] draw a box at 10% lower and upper in scatter plot
> 
> 
> Hi,
> ?
> I would like to draw a box at each corner of lower 10% and 
> upper 10% in the scatter plot on(0,1)*(0,1) ?to indicate the 
> lower and upper tail.? I hope somebody can help me.
> ?
> Here is my code:
> ## scatter plot
> plot(hume_uni[,2],beec_uni[,2], pch=19, xlab="Hume_uni", 
> ylab="Beec_uni", col= "blue") title(main="Scatter
plot of
> uniformised data of Hume and Beechworth", font.main= 4) 
> abline(lm(hume_uni[,2]~beec_uni[,2]), col= "red").
> ?
> Thank you so much fro any help given.
> 
> 
> 
> 
>       
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> 
>