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Re: Counting Categories

  • To: mathgroup at smc.vnet.net
  • Subject: [mg96839] Re: Counting Categories
  • From: Raffy <raffy at mac.com>
  • Date: Thu, 26 Feb 2009 07:52:39 -0500 (EST)
  • References: <go31gb$f8r$1@smc.vnet.net>

You need to be more specific about your data structure, ie. post an
example.

It sounds to me like you have a list of observations?
Where each observation is a {color, size} pair?

vColor = {red, blue, green};
vSize = {small, medium, large};
mObs = Transpose[RandomChoice[#, 100] & /@ {vColor, vSize}];

In[118]:= mObs // Tally

Out[118]= {{{blue, large}, 14}, {{green, small}, 15}, {{blue, medium},
   13}, {{red, medium}, 7}, {{blue, small}, 9}, {{red, large},
  12}, {{green, large}, 11}, {{green, medium}, 9}, {{red, small}, 10}}





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