[R] t-scores and correlation
William Revelle
lists at revelle.net
Sat Jul 11 23:26:06 CEST 2009
Adrian and Jorge,
Try either rcorr in the Hmisc package or corr.test in the psych package.
They both will give you a matrix of correlations as well as the p
values of the correlations.
Bill
At 4:38 PM -0400 7/10/09, Jorge Ivan Velez wrote:
>Hi Adrian,
>Using cor.test you need either two variables or a formula as stated in
>?cor.test :-)
>
>Take a look at
>
>http://www.nabble.com/Re:-applying-cor.test-to-a-(m,-n)-matrix---SUMMARY-to17150239.html#a17150239
>
>for different alternatives to do what you asked for.
>
>HTH,
>
>Jorge
>
>
>On Fri, Jul 10, 2009 at 4:25 PM, Adrian Johnson
><oriolebaltimore at gmail.com>wrote:
>
>> Thank you Jorge.
>>
>> I tried it, i have the following error. honestly I dont understand the
>> error. could you help please.
>> thank you.
>>
>> > cor.test(t(longley),method='pearson')
>> Error in cor.test.default(t(longley), method = "pearson") :
>> element 1 is empty;
>> the part of the args list of 'length' being evaluated was:
>> (y)
>>
>>
>>
>>
>>
>> On Fri, Jul 10, 2009 at 4:22 PM, Jorge Ivan
>> Velez<jorgeivanvelez at gmail.com> wrote:
>> > Dear Adrian,
>> > See ?cor.test.
>> > HTH,
>> >
>> > Jorge
>> >
>> >
>> > On Fri, Jul 10, 2009 at 4:13 PM, Adrian Johnson <
>> oriolebaltimore at gmail.com>
>> > wrote:
>> >>
>> >> Hi I have a matrix with samples on columns and variables and their
>> >> values on rows.
>> >> I want to calculate correlation (pearson) between a variable and
>> >> others in rows and obtain t-scores for the variables.
>> >> how can i do it.
>> >> thank you.
>> >> Ad
>> >>
>> >> ______________________________________________
>> >> R-help at r-project.org mailing list
>> >> https://stat.ethz.ch/mailman/listinfo/r-help
>> >> PLEASE do read the posting guide
>> >> http://www.R-project.org/posting-guide.html
>> >> and provide commented, minimal, self-contained, reproducible code.
>> >
>> >
>>
>
> [[alternative HTML version deleted]]
>
>______________________________________________
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>PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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--
William Revelle http://personality-project.org/revelle.html
Professor http://personality-project.org/personality.html
Department of Psychology http://www.wcas.northwestern.edu/psych/
Northwestern University http://www.northwestern.edu/
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