# Re: [R] extract t-values from pairwise.t.test

From: Petr Pikal <petr.pikal_at_precheza.cz>
Date: Mon 08 Aug 2005 - 16:46:17 EST

Hallo

My output lists more than p-values

> ttt<-t.test(rnorm(10), rnorm(10), paired=T)
> ttt

Paired t-test

data: rnorm(10) and rnorm(10)
t = 1.7508, df = 9, p-value = 0.1139
alternative hypothesis: true difference in means is not equal to 0 95 percent confidence interval:
-0.1750263 1.3735176
sample estimates:
mean of the differences

0.5992456

> str(ttt)

List of 9
\$ statistic : Named num 1.75
..- attr(*, "names")= chr "t"
\$ parameter : Named num 9
..- attr(*, "names")= chr "df"
\$ p.value : num 0.114
\$ conf.int : atomic [1:2] -0.175 1.374   ..- attr(*, "conf.level")= num 0.95
\$ estimate : Named num 0.599
..- attr(*, "names")= chr "mean of the differences"  \$ null.value : Named num 0

```  ..- attr(*, "names")= chr "difference in means"
\$ alternative: chr "two.sided"
\$ method     : chr "Paired t-test"
\$ data.name  : chr "rnorm(10) and rnorm(10)"
```
• attr(*, "class")= chr "htest"
> ttt\$statistic
t 1.750790
>

The output is list and you can call any part of it by its name or by [] braces.

HTH
Petr

On 8 Aug 2005 at 16:26, Guido Parra Vergara wrote:

> Hi,
>
> how can I extract the t-values after running a pairwise.t.test? The
> output just list the p-values. Many thanks for your help.
>
> Cheers
> Guido
>
>
>
> ____________________________________
>
> Guido J. Parra
> School of Tropical Environment Studies and Geography
> James Cook University
> Townsville
> Queensland 4811
>
> Phone: 61 7 47815824
> Fax: 61 7 47814020
> Mobile: 0437630843
> e-mail: guido.parravergara@jcu.edu.au
>
> ______________________________________________
> R-help@stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help