Data is all spaced out, I want it to fill from first row in matrix

I have this code:

%% Combine the data %combined = [6050,54]% define size of combined

SWOA = zeros(100,5); CWOA = zeros(100,5); SWA = zeros(100,5); CWA = zeros(100,5);

for i = 8:length(mydata)%loop to group data together into jump types

   if grouped(i,4) == 1

        SWOA(i,1) = grouped(i,1);

      else if grouped(i,4) == 2

            CWOA(i,1) = grouped(i,1);

          else if grouped(i,4) == 3

                 SWA(i,1) = grouped(i,1);

              else if grouped(i,4) == 4

                    CWA(i,1) = grouped(i,1);

                  else if grouped(i,4)== 0

                          continue 
                      end
                  end
            end
        end
    end
end

I have wrote the code so that if fills the row with the corresponding trial number however this is the result:

Instead of writing them to the corresponding row number I want it to fill the variable from row 1 cell 1 but in the loop I know I have writen for example SWOA(i,1) which I don't know how to change as it is in a loop and I need all the values, I don't want it to overwrite everytime.