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Support plots that use by with rasterize with hv.ImageStack #1132

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merged 6 commits into from Sep 19, 2023
Merged

Support plots that use by with rasterize with hv.ImageStack #1132

merged 6 commits into from Sep 19, 2023

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ahuang11
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@ahuang11 ahuang11 commented Sep 9, 2023 •
edited

Alongside holoviz/holoviews#5751

import pandas as pd
import hvplot.pandas
import holoviews as hv
hv.extension('bokeh')

df = pd.DataFrame(
    {
        "time": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
        "value": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
        "by": ["d", "d", "d", "a", "a", "b", "b", "b", "b", "b"],
    }
)

df.hvplot(
    x="time",
    y="value",
    by="by",
    rasterize=True,
    color_key="RdBu_r"
)
image

colorbar is not yet supported in HoloViews.

@ahuang11 ahuang11 changed the title WIP overlaying rasterized WIP overlaying rasterized plots incorrect colormap and wrong colorbar Sep 9, 2023
@ahuang11 ahuang11 changed the title WIP overlaying rasterized plots incorrect colormap and wrong colorbar Overlaying rasterized plots Sep 9, 2023
@ahuang11 ahuang11 changed the title Overlaying rasterized plots Support by with rasterize plots for ImageStack Sep 9, 2023
@ahuang11 ahuang11 changed the title Support by with rasterize plots for ImageStack Support plots that use by with rasterize with hv.ImageStack Sep 9, 2023
Hoxbro
Hoxbro reviewed Sep 9, 2023
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When running the code (with holoviz/holoviews#5751), I get the following plot. I suspect some custom handling of the hover tool is needed.

image

hvplot/converter.py Outdated Show resolved Hide resolved
@maximlt maximlt added this to the 0.9.0 milestone Sep 11, 2023
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maximlt commented Sep 11, 2023

Just noting, we need to open an issue to record that this needs to be documented when HoloViews is released with the new feature this PR depends on.

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I am confused, what needs to be documented?

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maximlt commented Sep 11, 2023

Sorry for the lack of context. rasterize together with by should certainly be documented, Simon said he already has a notebook in preparation. I'll open an issue.

@maximlt maximlt mentioned this pull request Sep 11, 2023
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When running the code (with holoviz/holoviews#5751), I get the following plot. I suspect some custom handling of the hover tool is needed.

image

Seems like this needs to be fixed in holoviews
image

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Hoxbro commented Sep 12, 2023

I have left a comment in the holoviews issue about the hover tool. I'm also a bit surprised that the colorbar stops at 0.8.

Hoxbro
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@ahuang11 @Hoxbro
Update hvplot/converter.py
c892111 
Co-authored-by: Simon Høxbro Hansen <simon.hansen@me.com>
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If this is ready, you can merge it.

hvplot/tests/testoperations.py
@@ -194,6 +195,11 @@ def test_datashade_rescale_discrete_levels_default_True(self):
actual = plot.callback.inputs[0].callback.operation.p['rescale_discrete_levels']
assert actual is expected

def test_rasterize_by(self):
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This should also have a version check, but let us ignore it if all tests pass.

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Yep for us it works well but sometimes distros that re-package our tools complain about this kind of stuff (and probably just patch things).

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Ok I'll add a check in another PR

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#1144

@ahuang11 ahuang11 merged commit 3700ae2 into main Sep 19, 2023
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@ahuang11 ahuang11 deleted the overlay_imagestack branch September 19, 2023 15:31
ahuang11 added a commit that referenced this pull request Sep 27, 2023
@ahuang11 @Hoxbro
Support plots that use by with rasterize with hv.ImageStack (#1132)
2cd9a10 
* WIP overlaying rasterized

* Clean up

* Add rasterize to check for categorical

* Add test

* Add version check

* Update hvplot/converter.py

Co-authored-by: Simon Høxbro Hansen <simon.hansen@me.com>

---------

Co-authored-by: Simon Høxbro Hansen <simon.hansen@me.com>
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@maximlt maximlt maximlt left review comments

@Hoxbro Hoxbro Hoxbro approved these changes

@philippjfr philippjfr Awaiting requested review from philippjfr

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