Message-ID: <47CB8ED6.10705@jcu.edu.au>
Date: 2008-03-03T05:38:30Z
From: Richard Rowe
Subject: Problem with PCA
In-Reply-To: <15797095.post@talk.nabble.com>
This is a homework problem. I know how to do a PCA, you need to learn.
I suggest you visit your textbook, then check the documentation for R's
various PCA implementations to work out how to effect the analysis.
phthao05 wrote:
> I have an exercise. With 3 kinds of yohourt a,b,c. There are 25
> participatients estimate 3 norms: taste (va,vb,vc), structure (ca,cb,cc) and
> price (ga,gb,gc) and give the mark from 1 to 5. I don't know how to PCA this
> data. Please help me!
> I attached the data file follow:
> Va Vb Vc Ca Cb Cc Ga Gb Gc
> 4 2 4 5 5 5 4 4 2
> 2 2 4 3 2 5 4 5 1
> 2 2 1 2 3 3 3 1 4
> 1 1 2 2 3 3 4 3 2
> 3 4 4 4 3 1 2 1 2
> 1 1 1 1 2 4 3 2 4
> 4 4 2 2 2 1 2 1 3
> 2 3 3 3 4 3 1 1 1
> 4 5 1 3 3 2 4 2 4
> 2 2 5 1 1 3 2 3 3
> 4 2 4 5 3 3 4 4 4
> 3 4 2 1 2 2 1 2 4
> 1 2 1 2 3 3 3 1 4
> 3 4 1 1 2 1 2 3 3
> 5 4 3 4 3 1 1 1 2
> 4 4 2 2 2 1 4 2 4
> 2 2 1 1 2 4 3 2 4
> 3 1 3 4 2 5 3 4 1
> 1 1 2 2 3 3 4 3 2
> 2 3 4 3 4 4 4 3 1
> 2 3 3 3 4 3 1 1 1
> 4 3 1 1 1 2 2 3 3
> 1 1 1 1 2 4 3 2 4
> 3 4 2 1 2 2 3 1 3
> 3 4 2 1 2 2 1 2 4
>
>
--
Dr Richard Rowe
Zoology & Tropical Ecology
School of Marine & Tropical Biology
James Cook University
Townsville 4811
AUSTRALIA
ph +61 7 47 81 4851
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