The chi-squared test is one option (and seems reasonable to me if it
the the proportions/patterns that you want to test). One way to do
the test is to combine your 2 matrices into a 3 dimensional array (the
abind package may help here) and test using the loglin function.
On Thu, Mar 8, 2012 at 5:46 AM, aaral singh <aaral.singh at gmail.com>
wrote:> Hi.Please help if someone can.
>
> Problem:
> I have 2 matrices
>
> Eg
>
> matrix 1:
> ? ? ? ? ? ? ? ?Freq ?None ?Some
> ?Heavy ? ?3 ? ? ? ?2 ? ? ? ? ?5
> ?Never ? ?8 ? ? ? 13 ? ? ? ? 8
> ?Occas ? ?1 ? ? ? ?4 ? ? ? ? ?4
> ?Regul ? ? 9 ? ? ? ?5 ? ? ? ? 7
>
> matrix 2:
> ? ? ? ? ? ? ? ? ?Freq ? ? None ? ? Some
> ?Heavy ? ? ? ?7 ? ? ? ? ?1 ? ? ? ? ? ? 3
> ?Never ? ? ?87 ? ? ? ? 18 ? ? ? ? ?84
> ?Occas ? ? ?12 ? ? ? ? ? 3 ? ? ? ? ? ?4
> ?Regul ? ? ? ?9 ? ? ? ? ? ?1 ? ? ? ? ? ?7
>
>
> I want to see if matrix 1 is significantly different from matrix 2. I
> consider using a chi-squared test. Is this appropriate?
> Could anyone advise?
> Many thank you.
> Aaral Singh
>
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Gregory (Greg) L. Snow Ph.D.
538280 at gmail.com