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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