From kjetilbrinchmannhalvorsen at gmail.com  Sat Mar 25 21:57:50 2006
From: kjetilbrinchmannhalvorsen at gmail.com (Kjetil Brinchmann Halvorsen)
Date: Sat, 25 Mar 2006 16:57:50 -0400
Subject: [Rd] How to capture t-score and p-values from t.test
In-Reply-To: <136753ACA3E9A5498440B172A77F4BF20A5D331B@whexchmb15.bsna.bsroot.bear.com>
References: <136753ACA3E9A5498440B172A77F4BF20A5D331B@whexchmb15.bsna.bsroot.bear.com>
Message-ID: <4425AECE.7000108@gmail.com>

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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[Rd] How to capture t-score and p-values from t.test
Kjetil Brinchmann Halvorsen