Question

Matlab: Write a function called minimax that takes M, a matrix input argument and returns mmr, a row vector containing the absolute values of the difference between the maximum and minimum valued elements in each row. As a second output argument called mmm, it provides the difference between the maximum and minimum element in the entire matrix. See the code below for an example: >> A = randi(100,3,4) A = 66 94 75 18 4 68 40 71 85 76 66 4 >> [x, y] = minimax(A) x = 76 67 81 y = 90

Code to call your function [mmr, mmm] = minimax([1:4;5:8;9:12])

Answer 1

function [mmr, mmm] = minimax(M)
    mmr = [];
    [r, c] = size(M);
    for i=1:r
        min_val = M(i, 1);
        max_val = M(i, 1);
        for j=1:c
            if M(i, j) > max_val
                max_val = M(i, j);
            end
            if M(i, j) < min_val
                min_val = M(i, j);
            end
        end
        mmr(i) = max_val-min_val;
    end
    min_val = mmr(1);
    max_val = mmr(1);
    for i=1:r
        if mmr(i) < min_val
            min_val = mmr(i);
        end
        if mmr(i) > max_val
            max_val = mmr(i);
        end
    end
    mmm = max_val-min_val;
end