Re: [R] Confidence Bounds on QQ Plots?

[Spencer Graves]

Thanks to Uwe Ligges, Andy Liaw, and Bill Pikounis for 3 useful 
replies.  I had seen the description in "S Programming", but forgot 
where I had seen it.  When I couldn't find it in MASS, I got confused.  
I will also check John Fox's work. 

     Thanks again. 
     Best Wishes,
     Spencer Graves    

Pikounis, Bill wrote:
Spencer,
Venables & Ripley's S Programming (2000) book comprehensively covers
"Simulation envelopes for normal scores plots" in Section 7.3, pages 161 -
163.  The Atkinson "Plots, Transformations, and Regression" (1985) book is
cited. 

The V & R example and discussion, as usual, is very informative on both the
programming and data analysis fronts.
Hope that helps,
Bill
----------------------------------------
Bill Pikounis, Ph.D.
Biometrics Research Department
Merck Research Laboratories
 

-----Original Message-----
From: [EMAIL PROTECTED] 
[mailto:[EMAIL PROTECTED] On Behalf Of Spencer Graves
Sent: Tuesday, June 01, 2004 2:36 PM
To: R Help
Subject: [R] Confidence Bounds on QQ Plots?

     What's the current best wisdom on how to construct confidence 
bounds on something like a normal probability plot? 

     I recall having read a suggestion to Monte Carlo something like 
201 simulated lines with the same number of points, then sort 
the order 
statistics, and plot the 6th and 196th of these.  [I use 201 not 200 
because quantile(1:201, c(0.025, 0.975)) = 6 and 196 while 
quantile(1:200, c(0.025, 0.975)) = 5.975 and 11.025.]  I think I know 
how to do this, but before I code it, I'd like to ask two 
questions on 
this issue: 

     1.  Where can I find this in the literature?  I didn't find it 
where I thought it was, nor in anyplace else that seemed 
obvious to me, 
but I don't think I made it up and I'd like to give credit 
where credit 
it due. 

     2.  Are there better alternatives available, especially if the 
distribution is a compound mixture that is easily simulated 
but not so 
easily characterized analytically? 

     Thanks,
     spencer graves
______________________________________________
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! 
http://www.R-project.org/posting-guide.html

   

______________________________________________
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
 

______________________________________________
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html