Uniform sampling without replacement until everything is sampled once
simon-bachhuber opened this issue · comments
I would like to create a Table object where every unique trajectory is sampled exactly once, until everything is sampled once, then it should reset. I think one might be able to achieve something like that with priorities, i.e.
key| priority
001| 1.0
002| 1.0
...
999| 1.0
Draw with reverb.selectors.Prioritized sample with key=002
key| priority
001| 1.0
002| 0.0
...
999| 1.0
Repeat 998 times
key| priority
001| 0.0
002| 0.0
...
999| 0.0
Reset all priorities to 1.0
key| priority
001| 1.0
002| 1.0
...
999| 1.0
Is that possible?
Thank you :)
Your idea would work, but:
- after each sampling you would have to update priority of sampled item(s).
- for performance you might want to sample multiple elements at once and then within a single batch elements might be duplicated.
Another option would be to have 2 tables, both with max sample count per element == 1. One table would contain your data initially, the other would be empty. Then you sample from table 1 and insert sampled data to table 2. Once table 1 is empty, "swap" the tables. This way you can batch-sample many elements for performant execution.
Closing this issue to keep the backlog clean. Please reopen if you have follow-up questions.