how can I remove similar numbers that FOLLOW ?

Hello everybody,

I need your help about a small problem : I try to remove repetitions of a vector (only repetitions that follow!). There is a lot of help on the web in relation to this kind of problem, especially with the unique function but unfortunately it does not respond to my request.

I explain:

I have for example a vector x = [2 2 2 1 1 4 4 4 4 4 3 3 3 3 2 2 2 2 1 1 2 1 1 1] I want to get: y = [2 1 4 3 2 1 2 1] and not y = [2 1 4 3] as the unique function gives me (sorted or not). I want to remove only the repetitions that are follow and not all the duplicates ...

Do you have an idea without necessarily a function?

Thank you very much for your help,

DK

Answer 1

[Miroslav Balda]

This code works:

    y=x([x(2:end),0]~=x(1:end));

Answer 2

[MichMichel]

thanks a lot ;)

Answer 3

[MichMichel]

it's not work but i found that :

rep=diff(find(diff([-Inf x Inf])));
val=x(cumsum(rep));