How to produce distances from UTM

I've determined using Pythagoras I can produce distances between two UTM points into metres, to do this I need to take one easting away from the one above, so In the file I have a column of eastings and northings, I need to deduct the easting in the 2nd position from the first position for both eastings and northings and then square each of the answers, add them together and then square root the sum, how is this possible?

Answer 1

[Jakob Tougaard]

easting=[5000;5400;6300;6200];

northing=[65000;65500;65800;66500];

distance=sqrt(diff(easting).^2+diff(northing).^2);

Note that this is the euclidian distance, i.e. the curvature of the earth is ignored.