How to get the (only one) nearest/closest node in the network

Hi, I have problem to get the nearest node. This program connect the source node to all other nodes that are below or equal to 'radius'(i set this radius value to 10 m). I just need one, that is the closest to this source node. Please help me. this is the code:

for i=1:No_Nodes

        XDiff_Source(i)=Node_Loc(i,1) - Source_Loc(1,1);
        YDiff_Source(i)=Node_Loc(i,2) - Source_Loc(1,2);
        Distance_Source_Node(i)=(XDiff_Source(i)^2 + YDiff_Source(i)^2)^(0.5);
    if Distance_Source_Node(i)<= radius
       line([Source_Loc(1,1) Node_Loc(i,1)],[Source_Loc(1,2) Node_Loc(i,2)]);
       plot(Node_Loc(i,1), Node_Loc(i,2), 'pg'); hold on

    end

end

thank you.

Answer 1

[Sean de Wolski]

doc knnsearch %?

[sarah nik]

i am sorry, how to use this function?

[Jan]

Did the documentation leave any open questions?

help knnsearch
doc knnsearch