R help - May 2011 - Storing data from a test as a vector or matrix

I just finished a MANOVA test and got the following output:
> summary(M, test="Pillai")
                Df Pillai approx F num Df den Df    Pr(>F)    
as.factor(X)   3 1.1922   6.5948     36    360 < 2.2e-16 ***
Residuals      129                                            
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05
'.' 0.1 ' ' 1


I would like to store the values Df=3, Pillai=1.1922, P-value, etc. as a
vector. 

I have tried the following code that did not work:
> S=summary(M, test="Pillai")
>S1<-as.vector(S$Df, S$Pillai)
but I am getting an error every time. I have also tried just S$Df. Is there
a way to find out if "Df" and "Pillai" are correct headers
to reference. For
example maybe it is "df" or "degreesfreedom" etc.

I know the concept works because I have used it for logistic regression.

 >v1 <- as.vector(exp(L1$coefficients))

The difference is that I know "coefficients" is the correct header to
refer
to. 

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Hi,

I would suggest you to check the structure of your summary object with 
str(), like this:
S <- summary(M, test="Pillai")
str(S)

You will then see how to access each element of it.
If you cannot manage to do it yourself, then provide an example, or at 
least the output from str(s).
By the way, when you get an error, then copy it so that we have a better 
idea of what happens.

HTH,
Ivan




Le 5/4/2011 15:55, wwreith a ?crit :
> I just finished a MANOVA test and got the following output:
>
>> summary(M, test="Pillai")
>                  Df Pillai approx F num Df den Df    Pr(>F)
> as.factor(X)   3 1.1922   6.5948     36    360<  2.2e-16 ***
> Residuals      129
> ---
> Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05
'.' 0.1 ' ' 1
>
>
> I would like to store the values Df=3, Pillai=1.1922, P-value, etc. as a
> vector.
>
> I have tried the following code that did not work:
>
>> S=summary(M, test="Pillai")
>> S1<-as.vector(S$Df, S$Pillai)
> but I am getting an error every time. I have also tried just S$Df. Is there
> a way to find out if "Df" and "Pillai" are correct
headers to reference. For
> example maybe it is "df" or "degreesfreedom" etc.
>
> I know the concept works because I have used it for logistic regression.
>
>   >v1<- as.vector(exp(L1$coefficients))
>
> The difference is that I know "coefficients" is the correct
header to refer
> to.
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/Storing-data-from-a-test-as-a-vector-or-matrix-tp3495626p3495626.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> 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.
>
-- 
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. S?ugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calandra at uni-hamburg.de

**********
http://www.for771.uni-bonn.de
http://webapp5.rrz.uni-hamburg.de/mammals/eng/1525_8_1.php

I figured out that attributes is the command that I was trying to find. It
allowed me to find out that I was needing to use "stats" not
"Df" or
"Pillai" etc. Following command worked.
> S1<-as.vector(S$stats[1,])
However when I try the same thing with summary.aov it is not working.
>SA<-summary.aov(M)
>SA1<-as.vector(SA$Reponse IPS1)
or 
>SA1<-as.vector(SA$Reponse IPS1[1,])

Using attributes command I get " Response IPS1". I have tried several
variations like including the first space in the quotes, deleting the space
between the two words, adding in [1,], etc. The error is stating unexpected
text. I have even tried using " " which works for the stats line above
but
does not work here.


Again thanks for any suggestions on what I am not understanding here. 


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