Getting the minimum distance in a coordinates array

Let's say I have this array of coordinates (values are (x,y)):

centers =
          938 845
          810 1012
          147 875
          1162 810
          494 1039
          383 897
          203 1010

I need to pick 2 coordinates with the lowest difference on the X-axis (first column) because I need 2 points that are as closest as possible to each other. How can I do it?

Answer 1

[Paolo]

Your input:

 x = [938;810;147;1162;494;383;203];
 y = [845;1012;875;810;1039;897;1010];

Sort x:

 [tmpx,i] = sort(x);
 %Order y according to sorting index for x.
 tmpy = y(i);

Your two points are:

 P1 = [tmpx(1),tmpy(1)]
 P2 = [tmpx(2),tmpy(2)]

Output:

 P1 = 147 875
 P2 = 203 1010