Add a rolling mean filter

[niksirbi]

We've had a rolling median filter for quite some time now, but we've neglected to also add a rolling mean filter that works the same way.

@stellaprins had a need for a rolling mean filter while working on #429, and ended up implementing it using np.convolve.

It should be simple to either:

• add a mean_filter that works the same as median_filter
• come up with a more general filtering function that can be made to return the mean or the median, depending on a keyword argument.

Once we implement this, we should also edit the eye movement example introduced by #429 to use our new shiny filter function.

[samradhi1684]

hi @niksirbi i think i can work on this issue. could you please assign it to me?

[cs7-shrey]

@niksirbi I would like to work on it!

[Spkap]

Hi, I’d like to work on this issue. Could you assign it to me? Thanks!

[niksirbi]

Thanks all for expressing interest in solving this issue.

Note that there is no need to be assigned to an issue to start working on it.
Instead we encourage contributors to open a draft pull request early in the process, so that others can see the approach you are taking. Just make sure to mention this issue in the pull request (e.g. "closes #issue-number").

Given that there are already two PRs proposing alternative solutions to this issue (#455 and #459), I would refrain from further duplicating effort on this one.

[Spkap]

Hi @niksirbi ,
Thanks for the clarification. Since PRs #455 and #459 are already addressing this issue, I’ll refrain from duplicating efforts.
However, if there’s any scope to improve or extend the existing PRs, I’d be happy to contribute. Let me know if that makes sense!

Best,
Sourabh Kapure