Hey eveyone!  I hope someone can help wiht this question.  I have a matirux of all zeros and ones and I would like to indentify all unique patterns in the rows andthe number of times the pattern occurs.   I changed all zeros to NA tried to use prelim.norm to identify all patterns of missing data in the rows.  I got the message 
   
  Warning message:
NAs introduced by coercion 

  Any ideas of how to get this to work?  Or are there any way to indentify all the unique patterns in a huge matrix? ( 10000 x 71)
   
  Thanks for any suggestions!!
   
  Elizabeth Lawson

			
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