how to sum of column without sum function in a unit metrix

x1 = [1 2 3; 4 5 6; 7 8 9];
  all =(x1);
summa=0;
count = 0;
    for i=1:length(all)
       % fprintf("%d\n",i);
       summa = 0;
       for j = 1:length(all)
            summa = summa + all(j);
           % fprintf("%d ",j);
       end 
        fprintf("%d ",summa);
    end

I want to sum every column without sum function , i tried it but i can't can anyone help me please ?

Answer 1

[Matt J]

summa = summa + all(j,i);

[MD Anower Hossain]

can you please describe it why you use all(j,i); why j and i ? i used only j .

[Matt J]

Without this, "i" is not used anywhere. Why did you include a loop over "i" if you are not going to use it?