How to chose the nearest value

Suppose I have a point at location (3,800) and for this point, I have to select the nearest point. I have 3 points say (2,790), (3,770) and (2.5,780). How to find which one out of these three points is nearest to the given point (3,800)?

Answer 1

[nanren888]

So where are you stuck? Give us a hint of what you're thinking so far. Maybe calculate the distances & take the mimimum?

>> p=[3;800];

q = [2,790;3,770;2.5,780].';

d = sum((p*ones([1,size(q,2)])-q).^2,1);

[~,minI] = min(d)

minI =

     1

[Jan]

Solving homework questions is no benefit for the author or the forum.

REPMAT or BSXFUN are smarter than a multiplication with ONES.