Updating numbers to be in sequential order

I have a column of numbers [1 1 2 2 3 1 2 3 3 4 1 1 2] and I want to change the numbers so that they are in sequential order, resulting in [1 1 2 2 3 4 5 6 6 7 8 8 9]. How can I do this?

Answer 1

[Walter Roberson]

sort()

[Andrew]

Perhaps I could have phrased my question topic better, but I do not think this method would solve my problem.

[Walter Roberson]

Suppose the vector is stored in t. Then

Ordered = cumsum([1; diff(t(:))~=0]);

[Stephen23]

@Andrew: can you please explain how Walter Roberson's solution does not "solve my problem". Please tell us what you want it to do, or how it should be different.

What exactly is the problem then?

Answer 2

[Andrei Bobrov]

a = [1 1 2 2 3 1 2 3 3 4 1 1 2];
z = [0 3 7];

out = z(cumsum(diff([0,a == 1]) == 1)) + a;