uniq like function?

[Evan]

I know there is a function of "unique" which returns unique elements.
I occasionally need a function like the "uniq" command under bash
which only omit adjacent repeated elements. For example, uniq ([1, 2,
2, 3, 2, 2]) returns [1, 2, 3, 2]. Is there already such a function in
octave? Thanks in advance.