Add documentation saying the tsdownsample algorithm is available

[hoxbro]

#6059 added tsdownsample algorithms. We should, at a minimum, update the documentation to mention it.

Right now the other downsamples are mentioned here: https://holoviews.org/user_guide/Large_Data.html#working-with-time-series

[Victorasuquo]

on this now

[droumis]

Hi @Victorasuquo , were you planning on submitting a PR to address this issue?

[Victorasuquo]

yes

[droumis]

@Victorasuquo, we are planning to release the next HoloViews version in the coming days which includes new tsdownsample algorithms, which still needs docs. Do you have a PR for us to review? Otherwise, we may have to go ahead and add a first version of these docs, and perhaps then you could improve them after that

[droumis]

Here are some notes:

Enhanced Downsampling Options

Starting in HoloViews version 1.19.0, integration with the tsdownsample library introduces enhanced downsampling algorithms, e.g. via downsample1d(curve, algorithm='minmax') :

• lttb: Implements the Largest Triangle Three Buckets (LTTB) algorithm, optimizing the selection of points to retain the visual shape of the data.
• minmax: For each segment of the data, this method retains the minimum and maximum values, ensuring that peaks and troughs are preserved.
• minmax-lttb: A hybrid approach that combines the minmax strategy with LTTB.
• m4: A multi-step process that leverages the min, max, first, and last values for each time segment.

[Victorasuquo]

okay thanks for the hints, I will continue with this

[droumis]

Hi @Victorasuquo, what is your timeline for this task?