MATLAB: Change or remove duplicate matrix elements

Question

I have the matrix:

value =
  3.1727
  5.2495
  5.2708
  3.3852
  5.6222
  5.2708
  5.1444
  4.9834
  5.7499
  5.7499
  3.4728
  3.4728
  5.3560
  5.7499
  3.4728
  5.7286
  6.1225
  3.6539
  3.0351
  4.3020
  5.2296
  3.8040
  4.6747
  5.4412
  3.6539

and I want to add 0.1 to any duplicate entries, so that all values are unique, and none are removed.

I have tried:

value=sort(value)

for i=1:(length(value)-1)

    if value(i+1)==value(i);
        value(i+1)=(value(i+1)+0.1);
    end

end

But for some reason it has no impact on the matrix..

Your help is greatly appreciated, thanks!

**EDIT: how can i remove all but the first occurance of a duplicate value? unique does not work for me.

Answer 1

X = [1 2 3 3 4 5 2]';
X2 = sort(X,1);
idx = [false;diff(X2)<(10^-6)];  %equal to 10^-6th precision
X2(idx) = X2(idx)+.1;