Displaying 3 results from an estimated 3 matches for "tabb".
Did you mean:
tab
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 Pr(>F)
ind 2 2.05787 1.02...
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?
2001 Mar 28
2
nchar on data.frames
I don't understand why nchar() gives different string lengths for vectors
in a list than it does for vectors in a dataframe. Here's a snippet of
code:
> temp <- list(text=c("thug","jimbob","apple","thug"),numbers=1:4)
> nchar(temp$text)
[1] 4 6 5 4
> temp <- data.frame(temp)
> nchar(temp$text)
[1] 1 1 1 1
Could someone explain