[R] thurston case 5

[japomani]

John,

I installed the psych package and all it's dependencies. Then following the
psych manual, I type 

thurstone(x, ranks = FALSE, digits = 2)

the result is

Error: could not find function "thurstone"

Any suggestions?

Best,

Jared

John Fox-6 wrote:
> 
> Dear Jared,
> 
> See ?thurstone in the psych package. RSiteSearch("Thurstone") turns this
> up
> as the first hit. Also see the BradleyTerry package for the similar
> Bradley-Terry model.
> 
> Regards,
>  John
> 
> ------------------------------
> John Fox, Professor
> Department of Sociology
> McMaster University
> Hamilton, Ontario, Canada
> web: socserv.mcmaster.ca/jfox
> 
>> -----Original Message-----
>> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
> On
>> Behalf Of japomani
>> Sent: January-31-09 5:04 PM
>> To: r-help at r-project.org
>> Subject: [R] thurston case 5
>> 
>> 
>> Hi, I hope some one can help. I need to compute Thurston's case 5 on a
> large
>> set of data. I have gotten as far as computing the proportional
>> preference
>> matrix but the next math is beyond me.
>> 
>> Here us my matrix
>> 
>> 0.500	0.472	0.486	0.587	0.366	0.483	0.496	0.434
>> 0.528	0.500	0.708	0.578	0.633	0.554	0.395	0.620
>> 0.514	0.292	0.500	0.370	0.557	0.580	0.615	0.329
>> 0.413	0.422	0.630	0.500	0.783	0.641	0.731	0.663
>> 0.634	0.367	0.443	0.217	0.500	0.351	0.907	0.686
>> 0.517	0.446	0.420	0.359	0.649	0.500	0.325	0.559
>> 0.504	0.605	0.385	0.269	0.093	0.675	0.500	0.625
>> 0.566	0.380	0.671	0.337	0.314	0.441	0.375	0.500
>> 
>> Can someone help me write an R script to compute the Thurston Case 5
> values?
>> The result should be the scale values for each item.
>> 
>> I found three web pages that might be useful in this, but again, I didn't
>> know enough to translate them into a result.
>> 
>> http://marketing.byu.edu/htmlpages/books/pcmds/THURSTONE.html
>> http://www.personality-project.org/r/thurstone.html
>> http://en.wikipedia.org/wiki/Law_of_comparative_judgment
>> 
>> Thanks,
>> 
>> Jared
>> --
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>> tp21768835p21768835.html
>> Sent from the R help mailing list archive at Nabble.com.
>> 
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>> and provide commented, minimal, self-contained, reproducible code.
> 
> ______________________________________________
> 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.
> 
> 

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