[Rd] How to capture t-score and p-values from t.test
Kjetil Brinchmann Halvorsen
kjetilbrinchmannhalvorsen at gmail.com
Sat Mar 25 21:57:50 CET 2006
Bernzweig, Bruce (Exchange) wrote:
> When I do t.test on two distributions (see example below), it outputs
> numerous data about the t.test.
>
> What I'd like to do is individually capture some of this data and assign
> it to other variables.
>
> However, I am unable to find anything in the help section.
t.test returns an object of class "htest", but ?htest :
> ?htest
No documentation for 'htest' in specified packages and libraries:
you could try 'help.search("htest")'
but that does not do anythinh eiather.
Some time ago, I wrote a helpfile for htest, but that was rejected,
since "S3 classes are not usually documented".
Kjetil
>
>
>
> In the example below, the t value is -4.0441 and the p-value is 0.006771
>
> How can I assign these values to two variables, let's say tVal and pVal?
>
>
>
> Thanks,
>
>
>
> - Bruce
>
>
>
>> t.test(d[1], d[2], var.equal=TRUE)
>
> Two Sample t-test
>
> data: d[1] and d[2]
>
> t = -4.0441, df = 6, p-value = 0.006771
>
> alternative hypothesis: true difference in means is not equal to 0
>
> 95 percent confidence interval:
>
> -5.216430 -1.283570
>
> sample estimates:
>
> mean of x mean of y
>
> 2.50 5.75
>
>
>
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