Apologies if this is a simple question, this is my first time here, and I am a noob at statistics. I have a series of numbers and I want to find cutoff points that clearly separate, or group, the data.
Say I have this data:
You can see it is clearly grouped into two groups, the large values, and the small values. (Maybe 3 groups, with that first positive value being a group of its own.)
Is there any algorithm to determine these groups automatically/programmatically?