matlab - Weighted sampling with 2 vectors -


(1) have 2 column vectors. 

                           eg. x = [283167.778                                               *289387.207                                                    289705.322]                                             y = [9121643.314                                     9098348.666*                                     9099832.621]

(2) i'd make weighted random sampling using these vectors: when i'll select element 289387.207 in vector x, i'll choose element 9098348.666 in vector y.

(3) also, have weighted w vector each element in vector x , y.

how can implement in matlab? thanks!

for random selection:

sel_idx= randi(3); outputx = x(sel_idx); outputy = y(sel_idx);

for random weighing:

w = rand(size(x)); w = w./sum(w); % normalize outputx = w(:)'*x(:); outputy = w(:)'*y(:);

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