How can I get different elements of a vector?

For example, I have:

a = [3 5 5 9 5 3 9 5];

I need for answer:

3 5 9   % different elements in the vector
1 6     % index of first element 
2 3 5 8 % index of second element 
4 7     % index of third element

Help me!

Thank

Answer 1

[Azzi Abdelmalek]

a = [3 5 5 9 5 3 9 5];
[ii,jj,kk]=unique(a);
idx=accumarray(kk,1:numel(kk),[],@(x) {sort(x)'});
disp(ii)
celldisp(idx)

[Matt J]

Interesting that accumarray can return type 'cell'. But is that undocumented, I wonder???

[Sean de Wolski]

But is that undocumented, I wonder

No, it's documented (and super useful :) ).

[Matt J]

(and super useful :)

Indeed!