Relabel data points to remove gaps

Hello,

I have an array of data points, which looks like this when sorted into ascending order.

x = [ 18 23 30 54 54 98];

There are gaps between consecutive entries there are possibly duplicates.

I would like to relabel the entries like this

x = [ 1 2 3 4 4 5];

A possibility would be a for loop with an increment, but is there a better way?

Thanks very much!

Answer 1

[Birdman]

[~,~,idx]=unique(x)

[Adam]

Thank you! That's very easy!