How can find specific values form the below matrix?

Hi.

I have a Matrix A. It contains the several coordinates. I'd like to find the distance of each coordinate(x,y) from others.

And store only the coordinates that their distance from others is greater than 50.

Thank for your help.

%-----code

load A;

[dpb]

doc pdist
doc pdist2

then look up logical operators.

This is about a 2-3 liner...