Wishlist: doc examples wanted

Most items coming from questions on the community forum

• a proper multicategory bar example based on https://community.plotly.com/t/multicategory-axis-type-example/26392
• example of shape or annotation covering several subplots thanks to xref='paper'. Also the shapes and annotations tutorial should link to each other.
• orthographic projection example in 3d axes tutorial (or 3d camera controls)
• improve explanations on updatemenus and changing animation speed in animations. See https://stackoverflow.com/questions/59070876/plotly-how-do-the-buttons-for-the-update-menus-really-work/59076340#59076340, https://community.plot.ly/t/scatter-animation-doesnt-work/31944 https://community.plot.ly/t/need-animation-example-with-scattermapbox/9720/10 https://community.plot.ly/t/how-to-slow-down-animation-in-plotly-express/31309/7
• in slider page https://plot.ly/python/sliders/, add example using the update method (modifying both traces and layout), as in the buttons tutorial https://plot.ly/python/custom-buttons/, and also an example using relayout. Discussed in https://community.plot.ly/t/update-plot-with-restyle-method-get-the-current-selected-slider-value/36162/4.
• example using px.strip, see https://community.plotly.com/t/make-a-violin-plot-with-only-points/37412/3. In box plot page, and add a link also in violin page.
• example of sparkline in scatter and line page. See this community post.
• example using surfacecolor in 3d surface tutorial. See this community post.
• example of how to use go.Frame to target only certain traces in updates https://github.com/plotly/plotly.py/issues/2423#issuecomment-621906844
• example of how to use mapbox sourceattribution
• example of update_scenes and clarity on how update_xaxes is 2d only https://github.com/plotly/plotly.py/issues/2483 … similarly let’s ensure there’s an example somewhere in the docs for every update method: polar, ternary etc
• we need an example of append_trace somewhere, even just to say it’s equivalent to add_trace except that it doesn’t return the figure (for… reasons?)
• would be nice to have a demo of a facet grid map like this one:

[emmanuelle]

I removed some of the completed examples from the list, so that the existing list is more readable.

[emmanuelle]

@SylwiaOliwia2 thanks for your PRs! Regarding the histogram, what I meant is that you cannot access the count values from Python. As you show in the figure, you can indeed see the count in the hover but it stays in Javascript. Is this clear enough? This confused me a bit when I started using plotly.py