How can I remove duplicate values

Hi! I want remove duplicate values of array 'positions' where the corresponding value of d is lower.

Example:

[positions,d]=dsearchn(X,Y);

positions = 1 1 2 3 5 6 7 9 12 13 15 16

d= 235 386 189 67 158 266 180 92 187 191 156 194

In this case I want exclude the second position and obtain d= 235 189 67 158 266 180 92 187 191 156 194

Thanks, Appreciate the help !

Answer 1

[Walter Roberson]

[~, ~, uidx] = unique(positions, 'stable');
positions(uidx)
d(uidx)