Randomly Group Points Into Multiple Groups

[GlennimusPrime]

Hi there, I'm trying to find a simplified or procedural approach to splitting a large number of points into a specific number of groups, without the same point being in one of the other groups.

Let's say I have 1000 points and I'd like there to be 24 groups each with randomly selected points.

I have somewhat of an idea, although I'm stumped at the splitting into groups part (to be fair this is most of what I need )
 

• I start by creating a randomised ID based off @ptnum fit to 0-1 range
• Divide 1 by the number of required groups - in this case 24 = (0.041666)
• Next I need to be able to split the randomised id within 0.041666 into groups?
  
  Maybe I'm not thinking about this correctly?
  
  Hip file attached

Random_Groups.hip

[vicvvsh]

9 hours ago, GlennimusPrime said:

Hi there, I'm trying to find a simplified or procedural approach to splitting a large number of points into a specific number of groups, without the same point being in one of the other groups.

Let's say I have 1000 points and I'd like there to be 24 groups each with randomly selected points.

I have somewhat of an idea, although I'm stumped at the splitting into groups part (to be fair this is most of what I need )
 

• I start by creating a randomised ID based off @ptnum fit to 0-1 range
• Divide 1 by the number of required groups - in this case 24 = (0.041666)
• Next I need to be able to split the randomised id within 0.041666 into groups?
  
  Maybe I'm not thinking about this correctly?
  
  Hip file attached

Random_Groups.hip

Hi,

here is a hip file with may try. You can control amount of groups on a cluster points sop by "Clusters" parameter and  randomization by adjusting "Seed" parm on the same node or on a Sort sop.

Random_Groups_01.hipnc

[Ziyad]

Hey, 

 

Here's an alternative way of achieving it using a single line of code and a partition SOP. Pretty similar to Victor's method! 

Random_Groups.hiplc

[GlennimusPrime]

This is so great, thank you @vicvvsh. A nice simple system. I hadn't actually used or even heard of the cluster sop before! Seems like it may have many uses.

Also thank you @Ziyad another use for the partition sop I wasn't aware of. Both simple and great examples.

I was definitely thinking too deeply into a weird VEX solution here before, so these help out a lot.

Cheers for the help all!

Edited November 17, 2021 by GlennimusPrime