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Jacob Barhak
@Jacob-Barhak
Today I host my visualizations in Github because it is stable and visualizations there last for years - even Netlify that was supposed to be backed up with deep pockets changed their policy and no longer allow huge static files to be hosted - do you know enough about lightning to vouge for it that if I place a huge presentation file there it will still work in a few years? Or should I continue using Github for now?
You see @MarcSkovMadsen - part of the problem is that there is no publication venue that is stable that will support the visualizations we are doing - its not only a technical problem its much larger that that...
James A. Bednar
@jbednar
Hi @Jacob-Barhak ! I've been out of town, but am now back in Austin. I don't know why the order of features is lost in a heatmap; that sounds like a bug report if it's not one already! (And there are definitely several about order being messed with, which need to be addressed.) I feel like I did have a plan for the Python meetup, but could have imagined that. Would make sense to do it in e.g. January! I think that with UMAP + our new work on making Datashader fully hoverable we should be able to make some really useful exploratory tools.
Jacob Barhak
@Jacob-Barhak
ok @jbednar - if you want to have a talk soon, I will connect you to Florin who will schedule you - I am leaving Austin in three days for an unknown period of time. Yet I will still be involved - so you will still see communications from me. However, I did get an email from Indiana - they usually ask me for visualization projects for their students to implement - I ran out of ideas in the previous years, so I figured I should ask in this channel if anyone needs some visualization implemented - for some reason I suspect @MarcSkovMadsen may have some ideas yet anyone is interested so if you have ideas of visualizations students can implement as a class exercise - send me your email and I will make the necessary introductions . I will open an issue on Github once I return to Israel and settle down - give me 2 weeks and I will investigate the axis order of a Holomap - I may have missed something - yet if you look its an issue I will either resolve it and write a discord or raise a github issue. I am in a conference next week in Paris showing HoloViz generated presentations - wish me luck - the Holoviz team is int he acknowledgements ....
and @jbednar - you were on my talk list as a backup talk - I just contact you to see when is worthwhile for you to speak - usually its a good time when you have something new...
Jacob Barhak
@Jacob-Barhak
And @jbednar - just FYI - your presentations were used in 2 Keynotes I gave in France. You may find the presentations familiar - yet I have a few new things there you may want to look at. Here are the links:
The unit mapping now shows the visualization of features - this perhaps answers some of what @MarcSkovMadsen was looking for - how to help AI with visualization - yet there are more ways
zartarr88
@zartarr88:matrix.org
[m]
Has anyone thought about being able to run Panel from other tools on the go ? iPad has Carnets and Juno ; unfortunately cant install pyviz tools package . I loaded a bunch of notebooks on a long 8 hour flight and was wanting to practice some stuff , it was pretty neat . Its battery life is insane , whereas my laptop wouldve been dead in 1 hr
James A. Bednar
@jbednar
We've worked on using Panel to create mobile and tablet apps using Beeware, but I don't know of anyone who has tried actually doing application development on a tablet...
zartarr88
@zartarr88:matrix.org
[m]
Its also just a niche one off case ; so not worth the investment of time . Thought it was a neat environment for the flight ,
Ryan Abernathey
@rabernat
Hi Folks! qq - I am using hvplot to make a dynamic RGB plot of satellite data. The raw data (bands) are not normalized (in the interval 0 - 10000). Is there a way I can avoid manually normalizing the data and have hvplot do it for me instead?
James A. Bednar
@jbednar
Hi @rabernat ! Depends what you mean by "manual". It's easy to write a holoviews operation that transforms the data, at which point you'd type mynorm(someplot) instead of someplot to see the result. But it's still manual in that you have to write that operation and put it in some importable location. If you have normalizing code we'd be happy to write that up as a HoloViews operation for you; please just send us that code by email or open an issue on the HoloViews repo (even if it's an hvPlot example) if it can be public, and we'll respond there.
(For reference, datashade and rasterize are HoloViews operations, so if you've seen how to use those, you'd see how to use this custom operation.)
Marc Skov Madsen
@MarcSkovMadsen
I'm trying to add a user guide for hvplot+ibis+duckdb, but I've found that both ibis and duckdb don't have good support for datetime64[us]. They support datetime64[ns] though. To me datetime64[ns] is also what I normally see used. Is it on purpose that HoloViews is using datetime64[us] in a lot of places? holoviz/hvplot#991
image.png
As you can see in the picture its used a bit in image.py and a lot in datashader.py
Here is the ibis issue ibis-project/ibis#4998, which seems easy to fix
zartarr88
@zartarr88:matrix.org
[m]
anyone have any experience of launching jupyter notebooks on azure ? I get these options...
I've been moving static html files over ; I'm thinking its time to move onto the next layer of difficulty and actually get dynamic stuff going... do I just change that stack to Python ?
Marc Skov Madsen
@MarcSkovMadsen
I would definitely active "Web sockets" if you plan on using Jupyter, Bokeh, Panel or similarly running on Tornado server with web sockets.
zartarr88
@zartarr88:matrix.org
[m]
Ty i also found the sect in the guide
phidias
@phidias:matrix.org
[m]
Hello, hope you're all feeling increasingly well heading towards Xmas.
My question is: could anybody pls explain to me the distinction between Panel GridSpec and GridStack?
James A. Bednar
@jbednar
@philippjfr , The docs at https://panel.holoviz.org/reference/layouts/GridStack.html seem to mistakenly refer to GridSpec in multiple locations, making this question very difficult to answer.
phidias
@phidias:matrix.org
[m]
@jbednar: that's exactly what confused me
James A. Bednar
@jbednar
Me too! Wish I could have helped. :-/
Philipp Rudiger
@philippjfr
GridStack allows dynamic resizing and rearranging while GridSpec is static.
phidias
@phidias:matrix.org
[m]
Thank you @philippjfr
Do you know if there is a performance penalty for GridStack?
Maxime Liquet
@maximlt
The HoloViz packages have now (or very soon) their default branch pointing to main instead of master:
  • If you had an opened PR, GitHub should have pointed it automatically to main instead of master
  • When you visit a repo GitHub may let you know how to update your local repo.
    If you experience any struggle, don't hesitate to ask us!
Christoph Deil
@cdeil
The first example at https://panel.holoviz.org/index.html links to https://attractors.pyviz.demo.anaconda.com/attractors_panel which seems broken at the moment. Even though there's no error in the console I see a white screen. The other examples work OK.
Demetris Roumis
@droumis
Thanks for catching that @cdeil! Would you be willing to file an issue on https://github.com/holoviz/panel/issues?
1 reply
phidias
@phidias:matrix.org
[m]
Are there any known conflicts between panel extensions or in jupyter lab?
James A. Bednar
@jbednar
Not sure what you mean exactly; do you mean whether all panel extensions can be used together, whether all of them work in JLab, or...?
phidias
@phidias:matrix.org
[m]
Hi James, for instance on my current dashboard, I've got a combination of holoviews plots w/ bokeh backend and a few control widgets. That renders fine in JLab with the call pn.extension(throttled=True, raw_css=...)
However, when calling another extension like 'tabulator', that dashboard won't render anymore in JLab
James A. Bednar
@jbednar
Ah. Please just file a reproducible github issue with the failing version along with the closest non-failing version.
phidias
@phidias:matrix.org
[m]
So I take it, there should be no issues making several extension calls.
James A. Bednar
@jbednar
Combining multiple extensions is normal and expected, but there may indeed be some interactions in some cases, particularly between low-level bits like raw_css and extensions that have their own CSS. Just file an issue and we'll see what to make of it...
Christoph Deil
@cdeil

Is panel on Binder currently broken? Or am I using the wrong links?

I filed an issue here: holoviz/panel#4256

phidias
@phidias:matrix.org
[m]
Is it possible to activate autoreload when using pn.serve() instead of the command line call with --autoreload?
Btw the reference given in the api doc for serve() leads nowhere
Demetris Roumis
@droumis
@phidias I think the solution is to use pn.serve() within a python script and then launch the script with panel serve your_app.py --autoreload. Thanks! We'll fix it but this is the correct link: https://panel.holoviz.org/user_guide/Server_Configuration.html#serving-multiple-apps
ea42gh
@ea42gh_gitlab
anybody here know why an image upload to discourse.holoviews.org might fail?
I tried several times, and all I get is a link, rather than the image: lvim|690x459`
1 reply
James A. Bednar
@jbednar
Very strange!
phidias
@phidias:matrix.org
[m]
What is the best way to trace the execution of a programme that makes use of parameterized classes with param.depends? So to understand what triggers when the call of a function.
James A. Bednar
@jbednar
Good question. Maybe print a traceback at the start of the function call? https://docs.python.org/3/library/traceback.html
phidias
@phidias:matrix.org
[m]
Ok, I'm evaluating a combination of viztracer and eliot now. The latter may be a good package to hook into with param by providing the information stored in the event variable like when using the self.param.watch methodology?
James A. Bednar
@jbednar
Happy to accept a PR for Param that adds hooks in useful places for users to attach monitoring.
Marc Skov Madsen
@MarcSkovMadsen
Hi @phidias:matrix.org . Please share your findings. For example on Discourse.