Why am I getting "Too many output arguments"?

I am trying to run this function with a 3x3 input matrix, and I am getting the "Too many output arguments" error using row_sums.

Here is the code for my main function:

function ms_equal_col_row_diag_sums(square_matrix)

N=length(square_matrix);

magic_sum =(N*(N^2+1))/2;

row_sum=row_sums(square_matrix);

column_sum=column_sums(square_matrix);

ll_ur_diagonol=ll_ur_diagsum(square_matrix);

ul_lr_diagonal=ul_lr_diagsum(square_matrix);

if row_sum(1,:)==column_sum(1,:)==N*magic_sum & ll_ur_diagonol==ul_lr_diagonal==magic_sum

disp(1)

else disp(0)

end

end

This is the code for row_sums:

function row_sums(square_matrix)

sum(square_matrix') 

end

row_sums works if I use it individually with the same input. Ex. row_sums([2 7 6; 9 5 1; 4 3 8])=[15 15 15]

Thanks!

Answer 1

[Cedric]

Actually row_sums doesn't work as it outputs nothing. However, you have the impression that it works because it displays the output of sum(square_matrix') as the line doesn't end with a ; . For solving this issue specifically, you need to define an output argument:

 function s = row_sums(square_matrix)
    s = sum(square_matrix') ;
 end

Note that SUM can take an optional argument that defines the dimension (1 by default, but you could specify 2).