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2010 Aug 18
3
How to read ANOVA output
Hi folks,
Where can I find document re "how to read anova output"? Google found many of
them. But seemingly non of them can explain to me following output:-
> tabA = c(5.67, 5.67, 5.55, 5.57)
> tabB = c(5.75, 5.47, 5.43, 5.45)
> tabC = c(4.74, 4.45, 4.65, 4.94)
> tabs = data.frame(tabA, tabB, tabC)
> tablets = stack(tabs)
> anova(lm(values ~ ind, data = tablets))
Analysis of Variance Table
Response: values
Df Sum Sq Mean Sq F value...
2006 Mar 23
8
ActiveRecord & Prepared Statement
I searched the archives and found a thread about it, but I didn''t
understand: are prepared statement used by ActiveRecord on those
databases that could handle them (Postgresql, Mysql, Oracle etc)?
In case they are not used, are they planned? Is there a roadmap about
Rails I can find somewhere?