Eliminate/Remove duplicates from array Matlab

Question

How can I remove any number that has duplicate from an array.

for example:

b =[ 1 1 2 3 3 5 6]

becomes

b =[ 2 5 6]
         


        

Answer 1

Use unique function to extract unique values then compute histogram of data for unique values and preserve those that have counts of 1.

a =[ 1 1 2 3 3 5 6];
u = unique(a)
idx = hist(a, u) ==1;
b = u(idx)

result

  2 5 6

for multi column input this can be done:

a = [1 2; 1 2;1 3;2 1; 1 3; 3 5 ; 3 6; 5 9; 6 10] ;
[u ,~, uid] = unique(a,'rows');
idx = hist(uid,1:size(u,1))==1;
b= u(idx,:)