meaning of min_size and jump

[ulist0]

Hello,

I have some trouble understanding the min_size and jump parameters. As I understand it, if I set e.g. jump=5, only every 5th point will be considered (5, 10, 15, 20, 25, ...). So if 20 is detected as changepoint, the nearest points, that could also be a changepoints are 15 and 25. So this implies, that the minimum segment length is 5, just by setting jump=5 and a min_size < 5 should not do anything. So why is the default setting min_size=2 and jump=5? Also when I set min_size > jump in Pelt, it throws the following error:

Traceback (most recent call last): result=algo.predict(pen=1e+7) File "C:\Users\user\AppData\Local\anaconda3\envs\ust\lib\site-packages\ruptures\detection\pelt.py", line 117, in predict partition = self._seg(pen) File "C:\Users\user\AppData\Local\anaconda3\envs\ust\lib\site-packages\ruptures\detection\pelt.py", line 75, in _seg partitions[bkp] = min(subproblems, key=lambda d: sum(d.values())) ValueError: min() arg is an empty sequence

Am I getting something wrong?
Also with Window it seemed to me that min_size doesn't do anything.

Thanks for your help!