Calculate distance between XY coordinates

How do we calculcate one xy coordinate against other xy coordinates in a 1000x2 matrix?

Answer 1

[Sreeranj Jayadevan]

You can use the pdist function to calcluate pairwise distance between pairs of observations.

Suppose "Coords" is your 1000 by 2 matrix, then the following MATLAB code can give you the distance:

%%Calculate distance
loc_1=1;   
loc_2=2; 

Coord_1=Coords(loc_1,:);  % The first coordinate
Coord_2=Coords(loc_2,:);  % The second coordinate
pair=[Coord_1;Coord_2];

distance=pdist(pair,'euclidean');

"distance" will give you the euclidean distance between the first and second coordinates. You can loop through the coordinate locations (i.e loop through the "loc_i" variable) to find the distance between a particular coordinate and the rest of the coordinates.

Note: The same result can be achieved in multiple ways, eg: using norm,sqrt etc..

[Naruto]

Thank you Sreeranj, it worked!