R help - May 2008 - cor.test like cor?

Hi,

Is there a simple way to do correlation coefficient tests with  
"cor.test" like I would do with "cor" function? I have a
data frame
where each column is a list.

===============================================y <- data.frame(a=sample(30,
20), b=sample(30, 20), c=sample(30,20))
cor(y)
===============================================
But, cor.test does not take y alone, and it needs two vectors. We may  
do each test by iterating a pair of columns by loop. Is there a simple  
way to do it? I will appreciate your help.

Thank you,

Sang Chul

Try this:

y <- data.frame(a=sample(30, 20), b=sample(30, 20), c=sample(30,20))
x <- diag(1, length(names(y))
cors <- combn(names(y), 2,
           FUN = function(x)cor.test(y[,x[1]], y[,x[2]])$p.value)
x[lower.tri(x)] <- cors
x[upper.tri(x)] <- cors




On 5/2/08, Sang Chul Choi <choi@biology.rutgers.edu>
wrote:
>
> Hi,
>
> Is there a simple way to do correlation coefficient tests with
"cor.test"
> like I would do with "cor" function? I have a data frame where
each column
> is a list.
>
> ===============================================> y <-
data.frame(a=sample(30, 20), b=sample(30, 20), c=sample(30,20))
> cor(y)
> ===============================================>
> But, cor.test does not take y alone, and it needs two vectors. We may do
> each test by iterating a pair of columns by loop. Is there a simple way to
> do it? I will appreciate your help.
>
> Thank you,
>
> Sang Chul
>
> ______________________________________________
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> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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