How to find the maximum value from a matrix without using max syntax?

I have to find a max value without using matlab built in max syntax.

The code I have that I want to change the max syntax to for loop is

[i j] = max(abs(A(y:n, y)));

I tried following this code I found from another question:

 MaxValue = -Inf;
 row = 0;
 column = 0;
 for y = 1:size(A, 1)
     for y = 1:size(A, 2)
         if A(y, y) > MaxValue
             MaxValue = A(y:n, y);
             row = y:n;
             column = y;
         end
     end
 end

but my code is not running. I don't know where I am going wrong.

Answer 1

[David Hill]

s=sort(A);
maxValue=s(end);

Answer 2

[Cris LaPierre]

I suspect one issue to fix is that you use the same variable name for both loops. The variable can only hold one value at a time, so the loops are definitely not behaving as you intended.

for y = 1:size(A, 1)
     for y = 1:size(A, 2)

Use a different variable for each loop.

for y1 = 1:size(A, 1)
     for y2 = 1:size(A, 2)

Answer 3

[Davide Masiello]

I guess you could try something like this

A = randi(100,4,8);

for i = 1:size(A,1)
    for j = 1:size(A,2)
       if any(A(i,j)< A(:))
       else
           maxA = A(i,j);
           row  = i;
           col  = j;          
       end
    end
end

disp(A)
disp(maxA)
disp([row col])