R help - Feb 2005 - How to plot

Hello,

        I would like to know if R provides the similar function to produce 
the 4-in-1 graph ("Normal Plot of Residuals", "I Chart of
Residuals",
"Histogram of Residuals" & "Residuals vs Fits") as
MiniTab. If do not
have, could anyone please tell me how to produce above-mentioned 
individual chart?

        Your help is greatly appreciated.

Best Regards,
WeiQiang Li

	[[alternative HTML version deleted]]

you could use directly the plot function on an `lm' object, e.g.,

x <- runif(100, -3, 3)
y <- 1 + 2*x + rnorm(100)
m <- lm(y~x)
par(mfrow=c(2,2))
plot(m)

This doesn't produce the "I Chart" you wanted but it gives a very
good
picture about any strange behaviour of the residuals.

I hope it helps.

Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/16/336899
Fax: +32/16/337015
Web: http://www.med.kuleuven.ac.be/biostat/
     http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm


----- Original Message ----- 
From: <WeiQiang.Li at seagate.com>
To: <r-help at stat.math.ethz.ch>
Sent: Monday, February 28, 2005 10:35 AM
Subject: [R] How to plot

> Hello,
>
>        I would like to know if R provides the similar function to 
> produce
> the 4-in-1 graph ("Normal Plot of Residuals", "I Chart of 
> Residuals",
> "Histogram of Residuals" & "Residuals vs Fits") as
MiniTab. If do
> not
> have, could anyone please tell me how to produce above-mentioned
> individual chart?
>
>        Your help is greatly appreciated.
>
> Best Regards,
> WeiQiang Li
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! 
> http://www.R-project.org/posting-guide.html
>

On 28 Feb 2005 at 17:35, WeiQiang.Li at seagate.com wrote:
> Hello,
> 
>         I would like to know if R provides the similar function to
>         produce 
> the 4-in-1 graph ("Normal Plot of Residuals", "I Chart of
Residuals",
> "Histogram of Residuals" & "Residuals vs Fits") as
MiniTab. If do not
> have, could anyone please tell me how to produce above-mentioned
> individual chart?
Hi
> x<-rnorm(10)
> y<-10*x+5+rnorm(10)
> plot(x,y)
> fit<-lm(y~x)
> par(mfrow=c(2,2))
> qqnorm(resid(fit))
> hist(resid(fit))
> plot(fitted(fit),resid(fit))
>
for three plots. You can try to construct I Chart yourself. Go 
through help page of lm and you can find some other options how to 
plot your lm result.

Cheers
Petr







> 
>         Your help is greatly appreciated.
> 
> Best Regards,
> WeiQiang Li
> 
>  [[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
Petr Pikal
petr.pikal at precheza.cz