How can I get the value on 2nd column that has the minimum value in 1st column?

I have 200*2 matrix, first column contains data A and second column stands for x-location.

Like this,

A         x

304          1
234          2
213          3
454          4
123          5

I want to extract x-location where data A is the minimum. I am really newbie in MATLAB, please understand. And if possible, I would like to know how to save the x_location to external txt or csv file. Thank you.

Answer 1

[the cyclist]

M = [304 1
     234 2
     213 3
     454 4
     123 5];

[minA loc] = min(M(:,1));

xAtMin = M(loc,2);

[the cyclist]

There are many ways to read/write data to file. Maybe look here as a start.