adding the rows for unique numbers

I want to add the first column for each unique value in column 3. In this example i want the count 4 for 1 and count equal to 1 for the value 2 in column 3.

A=[0,1,0,1,1,0,0,0,0,1,1,0,0,0] % First column
B=[1,1,1,1,1,1,1,1,1,1,2,2,2,2] %second Column
ans= [4,1] % desired output

Answer 1

[Walter Roberson]

A = [0,1,0,1,1,0,0,0,0,1,1,0,0,0]; % First column
B = [1,1,1,1,1,1,1,1,1,1,2,2,2,2]; %second Column
[G, value] = findgroups(B(:));
total = accumarray(G, A(:));
table(value, total)

ans = 2×2 table
    value    total
    _____    _____

      1        4  
      2        1