Date:         Fri, 4 Jul 2003 23:34:52 -0700
Reply-To:     Dale McLerran <stringplayer_2@YAHOO.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Dale McLerran <stringplayer_2@YAHOO.COM>
Subject:      Re: REPEATED, UN, CS intraclass correlation
Comments: To: Akin Pala <akin@DR.COM>
In-Reply-To:  <3f056cb6@shknews01>
Content-Type: text/plain; charset=us-ascii

--- Akin Pala <akin@DR.COM> wrote:
>
>   here is the corr matrix for the first animal, untill week 9
> calculated
> with ante(1):
>                           Estimated R Correlation Matrix for KNo 2202
>
>  Row      Col1      Col2      Col3      Col4      Col5      Col6
> Col7
> Col8      Col9
>
>    1    1.0000    0.8166    0.7718    0.7551    0.7284    0.6962
> 0.6725
> 0.6503    0.6337
>    2    0.8166    1.0000    0.9451    0.9247    0.8919    0.8525
> 0.8235
> 0.7963    0.7760
>    3    0.7718    0.9451    1.0000    0.9784    0.9437    0.9021
> 0.8714
> 0.8426    0.8211
>    4    0.7551    0.9247    0.9784    1.0000    0.9646    0.9220
> 0.8906
> 0.8611    0.8392
>    5    0.7284    0.8919    0.9437    0.9646    1.0000    0.9559
> 0.9233
> 0.8928    0.8700
>    6    0.6962    0.8525    0.9021    0.9220    0.9559    1.0000
> 0.9660
> 0.9340    0.9102
>    7    0.6725    0.8235    0.8714    0.8906    0.9233    0.9660
> 1.0000
> 0.9669    0.9423
>    8    0.6503    0.7963    0.8426    0.8611    0.8928    0.9340
> 0.9669
> 1.0000    0.9745
>    9    0.6337    0.7760    0.8211    0.8392    0.8700    0.9102
> 0.9423
> 0.9745    1.0000
>   10    0.6014    0.7364    0.7792    0.7964    0.8257    0.8638
> 0.8942
> 0.9248    0.9490
>   11    0.5846    0.7159    0.7575    0.7742    0.8027    0.8397
> 0.8693
> 0.8991    0.9226
>   12    0.5697    0.6976    0.7382    0.7544    0.7822    0.8183
> 0.8471
> 0.8761    0.8990
>   13    0.5603    0.6860    0.7259    0.7419    0.7692    0.8047
> 0.8331
> 0.8616    0.8841
>   14    0.5525    0.6766    0.7159    0.7317    0.7585    0.7936
> 0.8215
> 0.8496    0.8719
>   15    0.5376    0.6583    0.6965    0.7119    0.7381    0.7722
> 0.7994
> 0.8267    0.8483
>   16    0.5113    0.6261    0.6625    0.6772    0.7020    0.7345
> 0.7603
> 0.7863    0.8069
>   17    0.4919    0.6023    0.6373    0.6514    0.6753    0.7065
> 0.7314
> 0.7564    0.7762
>

After the first week, it would appear that the correlations
are all quite similar.  What is different about the first week?
If it can be justified, I might consider dropping the first
week.  The an AR(1) structure would be much better than ANTE(1).
Of course, I don't know anything about the science here.  This
is purely a statistical observation.

Dale


=====
---------------------------------------
Dale McLerran
Fred Hutchinson Cancer Research Center
mailto: dmclerra@fhcrc.org
Ph:  (206) 667-2926
Fax: (206) 667-5977
---------------------------------------

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