MATLAB: Summation of matrix in column

matrix manipulation

hi, i have this final_mat (40×11), below is my code. What i trying to do is,first it will check the value of j:1 equal to j (1,2,3,4). If true, i need to sum between column in the same value of j. I tried few times but end up summation of row . and tried again until..this is my last code since fews time since morning 🙁
Please give me some idea how to solve this.
example of final_mat:
1 13 25 15 11 11 14 12 12 10 14
1 14 25 15 11 11 14 12 12 10 10
sum 27 50 30 22 22 28 24 24 20 24
2 13 26 14 11 11 14 12 12 13 13
2 13 25 14 12 11 14 12 12 13 13
2 13 25 14 11 11 14 12 13 13 13
3 13 24 14 11 11 14 12 12 12 14
3 13 24 14 10 11 14 12 12 13 14
  for n= 1:40
  for j=1:4
          if final_mat(j:1)==j
              for jj=2:11
              sum=sum+final_mat(:,jj) % stuck here.
          end
  end

Best Answer

final_mat = [ 1    13    25    15    11    11    14    12    12    10    14
1    14    25    15    11    11    14    12    12    10    10
2    13    26    14    11    11    14    12    12    13    13
2    13    25    14    12    11    14    12    12    13    13
2    13    25    14    11    11    14    12    13    13    13
3    13    24    14    11    11    14    12    12    12    14
3    13    24    14    10    11    14    12    12    13    14];
out = varfun(@sum,array2table(final_mat),'GroupingVariables',1)
out = out{:,[1,3:end]};
or
 [i,j] = ndgrid(final_mat(:,1),1:size(final_mat,2));
 out = accumarray([i(:),j(:)],final_mat(:),[],@sum);
 out(:,1) = unique(final_mat(:,1));
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