how to code in matlab struct form

how to code in matlab struct form to find the distances of nodes randomly selected from a randomly distrbuted nodes. pliz help

in the given code some nodes are selected based on some random number generated by nodes from i nodes and one struct matrix is formed for the new nodes and want to find distances for those new selected nodes. pliz help

Answer 1

[KSSV]

Read about pdist and pdist2. If you have coordinates(x1,y1) and (x2,y2) you may straight away use distance formula:

d = sqrt((x2-x1).^2+(y2-y1).^2)

[Guillaume]

You can also use hypot which supposedly is more reliable for extreme cases than using sqrt(dx.^2 + dy.^2) directly.

d = hypot(x2-x1, y2-y1);

[madhan ravi]

+1 Guillaume! , hypot's accuracy is higher.

[rem ng]

thanks all for your help !!!!