How do I get the maximum value for x with its corresponding y value?

I have 2 columns of numbers. I want to find the maximum value of the numbers in the x column and it's corresponding y value. I am not sure how to put in the code. please help

Answer 1

[Azzi Abdelmalek]

Example

A=[1 2;3 4;47 20;5 55]  
[xmax,idx]=max(A(:,1));
ymax=A(idx,2)

[Mike]

Don't really understand where your going with that. I tried using that in Matlab and its giving me an error msg. I only want to get the maximum value in the column 1 and the value of column 2 that is in the same row as the maximum value of column 1. So in your example I want matlab to get me 47, 20. How do I put in that code.

Thanks for the quick answer

[Azzi Abdelmalek]

That's what my code do

A=[1 2;3 4;47 20;5 55];  
[xmax,idx]=max(A(:,1));
ymax=A(idx,2);
xmax
ymax

% the result

 xmax =

    47

 ymax =

    20

[Mike]

Thanks, original code wasn't working