And every attempt I tried so far to generate "random clusters" hasn't really worked either.

What exactly have you tried and why hasn't it worked?

The approach moritz suggests (or variations thereof) seems to be rather straightforward, and given the brilliance of mind you've often exhibited here, I cannot believe you haven't already thought of it... :)   So, what's wrong with it?

In reply to Re: 3D test data that exhibits clustering? by Eliya
in thread 3D test data that exhibits clustering? by BrowserUk

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