MATLAB: Merging Unique Cell Array Elements

cell arrays

I have a cell array with non unique elements and an array with corresponding integer values. I'd like to combine all the repeat cell array values and sum the corresponding array values. Any ideas?
    % Old Data
    descr = {'A','B','C','A','B'}
    value = [2,4,6,-5,8]
    % New Data
    descr = {'A','B','C'}
    value = [-3,12,6]

Best Answer

See if this does what you want:
descr = {'A','B','C','A','B'};
value = [2,4,6,-5,8];
[Uv,~,ref] = unique(descr);
acc = accumarray(ref, value');
Result = table(Uv', acc)
Result = 
      Var1    acc
      ____    ___
      'A'     -3 
      'B'     12 
      'C'      6
The table output is optional, and just shows the result.
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