[R] ANOVA 1 too few degrees of freedom

[Rovinpiper]

Thanks slre,

I seem to be making some progress now.

Using a colon instead of an asterisk in the code really changes things. I
had been getting residual SS and MS of zero. Which is ridiculous. Now I get
much more plausible values. 

Also, When I used an asterisk instead of a colon It wouldn't give results
for three way interactions. With colons it will.

You are correct about plot being nested within treatment. There are six
plots in each of 2 treatments.

So, I guess I will have to perform a separate analysis to quantify the
effect of treatment.

Thanks again.

Analysis of Variance Table

Response: Combined.Rs
                                                                                
Df  Sum Sq   Mean Sq   F value          Pr(>F)    
Combined.Trt                                                             1  
52.80     52.805     96.2601       < 2.2e-16 ***
Combined.Plot                                                            10 
677.69   67.769     123.5380    < 2.2e-16 ***
as.factor(Combined.Day)                                            16 
2817.47 176.092   321.0041    < 2.2e-16 ***
Combined.Trt:as.factor(Combined.Day)                      16   47.82    
2.989       5.4487        4.048e-10 ***
Combined.Trt:Combined.Plot:as.factor(Combined.Day)80  455.42   5.693      
10.3776      < 2.2e-16 ***
Residuals                                                                   
284 155.79   0.549                       
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 


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