How to detect a column which gives me maximum value of the result.

Hello everyone,

for example I have to calculate z using the equation

z=y-x

here y is 15x1 matrix and x is also 15x1 matrix. I have 15 set of x which is 15x1 matrix and we can assume it as x=15x15 matrix. Now take a look at the code

for j=1:15

for i=1:15

z(i,j)=y(i)-x(i,j);

end

end

here I am getting the z as 15x15 matrix. Then I am calculating the sum of z. So for the maximum sum of z i want to know which 15x1 matrix of x have provided the max z. And assign it as x1 for further calcultation.

Thanks in advance.

Answer 1

[Star Strider]

Try this:

x = rand(15);                                   % Create Matrix
y = rand(15,1);                                 % Create Vector

[~,maxCol] = max(sum(y - x))                    % Result