R help - Feb 2008 - Two Way ANOVA

Hi,

I am using the:

pcf.aov<-aov(meas~op+part, data=pcf.ex2),

command to perform a two way ANOVA.  When I save the:

sumpcf<- summary.aov(pcf.aov),

result of the summary.aov command in a variable I need to access the 
individual pieces of information in the summary.  The summary appears 
to be a list and I am having a hard time finding a way to get at the 
information in the summary.  Could some one tell me how to go about 
it.

Thanks,

Keith Jones

Keith

Try names(sumpcf) or str(sumpcf).  That should help you find what you
want.

Incidentally, simply summary(pcf.aov) will do - R uses the appropriate
method based on the type of object.

HTH ....

Peter Alspach

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Keith Jones
> Sent: Friday, 29 February 2008 3:46 p.m.
> To: r-help at r-project.org
> Subject: [R] Two Way ANOVA
> 
> Hi,
> 
> I am using the:
> 
> pcf.aov<-aov(meas~op+part, data=pcf.ex2),
> 
> command to perform a two way ANOVA.  When I save the:
> 
> sumpcf<- summary.aov(pcf.aov),
> 
> result of the summary.aov command in a variable I need to 
> access the individual pieces of information in the summary.  
> The summary appears to be a list and I am having a hard time 
> finding a way to get at the information in the summary.  
> Could some one tell me how to go about it.
> 
> Thanks,
> 
> Keith Jones
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide 
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
The contents of this e-mail are privileged and/or confidential to the named
 recipient and are not to be used by any other person and/or organisation.
 If you have received this e-mail in error, please notify the sender and delete
 all material pertaining to this e-mail.

First time using, the mailing list and I'm somewhat new to R, so excuse me
if I do anything wrong.

I was wondering how I would set up a two way ANOVA for the following data:


      
      Nitrogen
  (0)
       
      Nitrogen
  (20)
       
       
         
       
      (cell
  means)
       
      (cell
  means)
      [Sulfur means]
        Sulfur (0)
      4.48
       
      5.76
       
       
         
      4.52
      (4.54)
      5.64
      (5.73)
      [5.14]
         
      4.63
       
      5.78
       
       
         
       
       
       
       
       
        Sulfur (3)
      4.70
       
      7.01
       
       
         
      4.65
      (4.64)
      7.11
      (7.05)
      [5.84]
         
      4.57
       
      7.02
       
       
         
       
       
       
       
       
        Sulfur (6)
      5.21
       
      5.88
       
       
         
      5.23
      (5.27)
      5.82
      (5.81)
      [5.54]
         
      5.38
       
      5.73
       
       
         
       
       
       
       
       
        Sulfur (9)
      5.88
       
      6.26
       
       
         
      5.98
      (5.81)
      6.26
      (6.30)
      [6.11]
         
      5.91
       
      6.37
       
       
         
       
       
       
       
       
        [Nitrogen means]
      [5.10]
       
      [6.22]
       
      
 
   Source ofVariation                   SSSulfur                                
3.15
Nitrogen                                  7.59
Sulfur x Nitrogen                     3.84
Error                                       0.08Total                           
14.66
>From googling I know I want to get it to the form:
> fit <- aov(y ~ A*B, data=mydataframe)
But what would I set for A, B and y?




     
____________________________________________________________________________________
Looking for last minute shopping deals?