On Aug 3, 2010, at 1:47 PM, imrib wrote:
>
> Hi all
> My data table (g) contains a continues data column (plant.height) and other
> columns (columns 8 to 57),
>
> each with number of levels of different factors. ANOVA test was done and
> the p-values were extracted
>
> as follos:
>
> a <-
The apply function coerces the factor results to a character array
apply(g,2,class) # gives character
The kruskal.test function doesn't take character vector as the group
argument.
kruskal.test(as.character(plant.height) ~ as.character(g[,8])) #doesn't work
kruskal.test(plant.height ~ as.characte
I would suggest to you the following:
1) Run the same thing, but with a loop instead of apply
2) add the to loop a printing that shows you on what cycle of the loop the
function breaks
3) see if that vector has any Inf or NA values (although in general I think
you are using a numeric instead of a f
Hi all
My data table (g) contains a continues data column (plant.height) and other
columns (columns 8 to 57),
each with number of levels of different factors. ANOVA test was done and
the p-values were extracted
as follos:
a <- function(x) anova(lm(plant.height ~ x))$"Pr(>F)"[1]
r<- apply(g[
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