Re: [R] A Quick and (Very) Dirty Intro to Stats in R

2005-11-11 Thread roger bos
John,
 Your appendix on linear mixed models does look good and I look forward to
reading it, but its 24 pages and Jarretts entire guide is less than 8 pages,
so my simple I think he meant short!
 Thanks,
 Roger

 On 11/8/05, John Fox [EMAIL PROTECTED] wrote:

 Dear Jarrett,


  -Original Message-
  From: [EMAIL PROTECTED]
  [mailto:[EMAIL PROTECTED] On Behalf Of Jarrett Byrnes
  Sent: Tuesday, November 08, 2005 6:41 PM
  To: R-help@stat.math.ethz.ch
  Subject: [R] A Quick and (Very) Dirty Intro to Stats in R
 

 . . .

  Most importantly, there are still a few holes that need to be
  filled - if they can be
 
  1) A SIMPLE explanation for how to do mixed models using lme.
  I am quite unsatisfied with most of what I've seen on the
  net, and if it even comes close to going over my head, it
  really won't fly with most folk I know. I've done the best I
  can, but I know if falls short.

 Possibly take a look at the appendix on mixed models to my R and S-PLUS
 Companion to Applied Regression, available at
 
 http://socserv.socsci.mcmaster.ca/jfox/Books/Companion/appendix-mixed-model
 s.pdf. This was intended to be a simple explanation.

 Regards,
 John

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[R] A Quick and (Very) Dirty Intro to Stats in R

2005-11-08 Thread Jarrett Byrnes
Greetings to all,
First off, I want to thank you all for answering any nagging questions 
I've had over the past few days.  I've been in the process of putting 
together A Quick and (Very) Dirty Intro to Doing Your Statistics in R  
(which I have posted to http://didemnid.ucdavis.edu/rtutorial.html ) in 
order to teach an R workshop for the graduate students in my 
department.  This is a guide for your everyday stats crunchers who want 
to free themselves from the cycle of SAS updates, have more flexibility 
than JMP or Statview will allow, but are not hardcore 
programming/think-about-stats-allday types.  These are people who get 
data from the natural world, and then find out what it's telling them.

So, to that end, I've put the guide together, and would be very 
interested in any comments you all would have.  Are there any 
statistical methods that you think I really should have included for 
this type of audience that I didn't (and if it's over my head, would 
you be interested in contributing)?  Is there anything just blatantly 
wrong or is unclear to a casual reader?

Most importantly, there are still a few holes that need to be filled - 
if they can be

1) A SIMPLE explanation for how to do mixed models using lme.  I am 
quite unsatisfied with most of what I've seen on the net, and if it 
even comes close to going over my head, it really won't fly with most 
folk I know.  I've done the best I can, but I know if falls short.
2) A method of looking at type II and III sums of squares for aov if 
there is a different error term included.
3) How does one plot canonical values and centroid groupings for a 
MANOVA?
4) How does one use manova to do repeated measures?  I've got the 
univariate method down, but would like to use manova a la the repeated 
statement in SAS.
5) Better output for post-hocs, and a Ryan's Q implementation.

Thanks in advance for any input, and I hope this can be a resource to a 
lot of people!



Jarrett Byrnes
Population Biology Graduate Group, UC Davis
Bodega Marine Lab
707-875-1969
http://www-eve.ucdavis.edu/stachowicz/byrnes.shtml

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Re: [R] A Quick and (Very) Dirty Intro to Stats in R

2005-11-08 Thread Peter Dalgaard
Jarrett Byrnes [EMAIL PROTECTED] writes:

 4) How does one use manova to do repeated measures?  I've got the 
 univariate method down, but would like to use manova a la the repeated 
 statement in SAS.

The examples for anova.mlm should detail this rather explicitly.


-- 
   O__   Peter Dalgaard Ă˜ster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark  Ph:  (+45) 35327918
~~ - ([EMAIL PROTECTED])  FAX: (+45) 35327907

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Re: [R] A Quick and (Very) Dirty Intro to Stats in R

2005-11-08 Thread John Fox
Dear Jarrett,


 -Original Message-
 From: [EMAIL PROTECTED] 
 [mailto:[EMAIL PROTECTED] On Behalf Of Jarrett Byrnes
 Sent: Tuesday, November 08, 2005 6:41 PM
 To: R-help@stat.math.ethz.ch
 Subject: [R] A Quick and (Very) Dirty Intro to Stats in R
 

. . .

 Most importantly, there are still a few holes that need to be 
 filled - if they can be
 
 1) A SIMPLE explanation for how to do mixed models using lme. 
  I am quite unsatisfied with most of what I've seen on the 
 net, and if it even comes close to going over my head, it 
 really won't fly with most folk I know.  I've done the best I 
 can, but I know if falls short.

Possibly take a look at the appendix on mixed models to my R and S-PLUS
Companion to Applied Regression, available at
http://socserv.socsci.mcmaster.ca/jfox/Books/Companion/appendix-mixed-model
s.pdf. This was intended to be a simple explanation.

Regards,
 John

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