[BioC] chi-squared

[Aaral [guest]]

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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