# \#xarray

**URL:** https://discourse.holoviz.org/tag/xarray/47.md

[Latest](https://discourse.holoviz.org/latest.md) · [Categories](https://discourse.holoviz.org/categories.md) · [Tags](https://discourse.holoviz.org/tags.md)

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## [Google Summer of Code 2026 HoloViz Projects](https://discourse.holoviz.org/t/google-summer-of-code-2026-holoviz-projects/9131)

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**Author:** [@ahuang11](https://discourse.holoviz.org/u/ahuang11)\
**Replies:** 0\
**Last updated:** [March 18, 2026, 8:52pm UTC](https://discourse.holoviz.org/t/google-summer-of-code-2026-holoviz-projects/9131 "2026-03-18T20:52:12Z")

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HoloViz is participating under the NumFOCUS umbrella for Google Summer of Code and has a couple project ideas: Lumen + Xarray and Panel / HoloViews MCP Integration. Please see below for more details!

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## [Cannot compose with xarray.Dataset with different dimensions](https://discourse.holoviz.org/t/cannot-compose-with-xarray-dataset-with-different-dimensions/6978)

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**Author:** [@mothersup](https://discourse.holoviz.org/u/mothersup)\
**Replies:** 4\
**Last updated:** [March 23, 2024, 4:51am UTC](https://discourse.holoviz.org/t/cannot-compose-with-xarray-dataset-with-different-dimensions/6978 "2024-03-23T04:51:03Z")

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Hi, I am trying to compose two interactive plots from two xarray.DataArray from the same xarray.Dataset, which one has an extra dimension. This extra dimension corresponds to a parameter, and I am plotting to compare the…

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## [Hvplot Explorer doesn't work with matplotlib and plotly backends for xarray with time dimension](https://discourse.holoviz.org/t/hvplot-explorer-doesnt-work-with-matplotlib-and-plotly-backends-for-xarray-with-time-dimension/6885)

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**Author:** [@pedroasmribeiro](https://discourse.holoviz.org/u/pedroasmribeiro)\
**Replies:** 2\
**Last updated:** [February 22, 2024, 7:12pm UTC](https://discourse.holoviz.org/t/hvplot-explorer-doesnt-work-with-matplotlib-and-plotly-backends-for-xarray-with-time-dimension/6885 "2024-02-22T19:12:47Z")

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When trying to use hvplot explorer with a temporal xarray.DataArray like da.hvplot.explorer() with alternative backends like matplotlib and plotly, with gives error: File ~/.local/lib/python3.8/site-packages/holoviews/p…

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## [Dealing high-resolution vector plots (XArray + Holoviz)](https://discourse.holoviz.org/t/dealing-high-resolution-vector-plots-xarray-holoviz/6310)

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**Author:** [@iuryt](https://discourse.holoviz.org/u/iuryt)\
**Replies:** 0\
**Last updated:** [October 31, 2023, 2:10pm UTC](https://discourse.holoviz.org/t/dealing-high-resolution-vector-plots-xarray-holoviz/6310 "2023-10-31T14:10:51Z")

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This starts with the problem discussed here. If we follow the example from documentation Vectorfield — hvPlot 0.9.0 documentation, but set to a high number of points, this is going to return either an overcrowded plot or…

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## [Interactive and dynamically created dict of widgets to xarray sel](https://discourse.holoviz.org/t/interactive-and-dynamically-created-dict-of-widgets-to-xarray-sel/4000)

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**Author:** [@StuckDuckF](https://discourse.holoviz.org/u/StuckDuckF)\
**Replies:** 16\
**Last updated:** [August 8, 2022, 1:53pm UTC](https://discourse.holoviz.org/t/interactive-and-dynamically-created-dict-of-widgets-to-xarray-sel/4000 "2022-08-08T13:53:45Z")

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I have a Select that chooses the data variable from an xarray dataset and I have written this little loop to identify and create the widgets necessary to select the data needed for a QuadMesh : widget\_box = pn.WidgetBo…

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## [Plotting a grid with categorical and datetime dimensions](https://discourse.holoviz.org/t/plotting-a-grid-with-categorical-and-datetime-dimensions/3972)

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**Author:** [@ronif](https://discourse.holoviz.org/u/ronif)\
**Replies:** 6\
**Last updated:** [July 29, 2022, 3:16am UTC](https://discourse.holoviz.org/t/plotting-a-grid-with-categorical-and-datetime-dimensions/3972 "2022-07-29T03:16:33Z")

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Hi. I’m trying to plot a grid with one categorical axis and one datetime axis. I’ve tried doing that using the xarray interface but it doesn’t seem to work, I get TypeError: cannot perform reduce with flexible type, beca…

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## [How to handle interactive Xarray Dataset of variable coordinated data variables?](https://discourse.holoviz.org/t/how-to-handle-interactive-xarray-dataset-of-variable-coordinated-data-variables/3997)

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**Author:** [@StuckDuckF](https://discourse.holoviz.org/u/StuckDuckF)\
**Replies:** 6\
**Last updated:** [July 27, 2022, 4:52pm UTC](https://discourse.holoviz.org/t/how-to-handle-interactive-xarray-dataset-of-variable-coordinated-data-variables/3997 "2022-07-27T16:52:48Z")

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I have an Xarray Dataset which looks like I would like to be able to select data variables (which I already know how to do) and plot a quadmesh of the data variable selected. The problem is that different data variable…

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## [Interactive Xarray dataset raster visualisation app using Panel and hvplot](https://discourse.holoviz.org/t/interactive-xarray-dataset-raster-visualisation-app-using-panel-and-hvplot/3978)

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**Author:** [@StuckDuckF](https://discourse.holoviz.org/u/StuckDuckF)\
**Replies:** 0\
**Last updated:** [July 21, 2022, 11:26am UTC](https://discourse.holoviz.org/t/interactive-xarray-dataset-raster-visualisation-app-using-panel-and-hvplot/3978 "2022-07-21T11:26:49Z")

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I am trying to replicate the Glaciers Demo using an Xarray of geospatial data. I am able to create pretty much exactly what I want but I am trying to create a Panel app that allows the user to select the data\_vars, each …

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## [Weird image size issues xarray, hvplot.xarray, panel](https://discourse.holoviz.org/t/weird-image-size-issues-xarray-hvplot-xarray-panel/3628)

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**Author:** [@ea42gh](https://discourse.holoviz.org/u/ea42gh)\
**Replies:** 2\
**Last updated:** [April 26, 2022, 5:32pm UTC](https://discourse.holoviz.org/t/weird-image-size-issues-xarray-hvplot-xarray-panel/3628 "2022-04-26T17:32:42Z")

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I am having really weird image size issues with xarray and hvPlot each combination I try has yet another display size! The code is in HoloviewsPlayground/ImageData2xarray.ipynb at master · ea42gh/HoloviewsPlayground · …

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## [Hvplot and xarray: What determines the default axes layout?](https://discourse.holoviz.org/t/hvplot-and-xarray-what-determines-the-default-axes-layout/2933)

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**Author:** [@michaelaye](https://discourse.holoviz.org/u/michaelaye)\
**Replies:** 7\
**Last updated:** [November 12, 2021, 5:04pm UTC](https://discourse.holoviz.org/t/hvplot-and-xarray-what-determines-the-default-axes-layout/2933 "2021-11-12T17:04:15Z")

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I was wondering what determines the default axes layout for a raster plot, when I don’t set x and y manually? I happen to have the “unwanted” default (of course :slight\_smile: ) in my situation: def xarray(self): …

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## [Quadmesh creating ugly aliasing? effect](https://discourse.holoviz.org/t/quadmesh-creating-ugly-aliasing-effect/2945)

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**Author:** [@michaelaye](https://discourse.holoviz.org/u/michaelaye)\
**Replies:** 0\
**Last updated:** [October 15, 2021, 6:26am UTC](https://discourse.holoviz.org/t/quadmesh-creating-ugly-aliasing-effect/2945 "2021-10-15T06:26:56Z")

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I have a xarray with an 3-dim spectrograph dataset with dimensions (spectral, spatial, samples). Due to calibration efforts, the resulting wavelength values are not equidistant, which is why holoviews recommends to use q…

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## [Panel webapp with dask/bokeh/tornado and asynchronous tasks](https://discourse.holoviz.org/t/panel-webapp-with-dask-bokeh-tornado-and-asynchronous-tasks/2388)

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**Author:** [@tivincent](https://discourse.holoviz.org/u/tivincent)\
**Replies:** 5\
**Last updated:** [June 22, 2021, 4:42pm UTC](https://discourse.holoviz.org/t/panel-webapp-with-dask-bokeh-tornado-and-asynchronous-tasks/2388 "2021-06-22T16:42:54Z")

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Hello ! I am developing a web app using panel/bokeh/tornado with dask/xarray. This app is hosted on a webserver and several users could use it at the same time. The aim is to visualize very big netcdf files with a fri…

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## [Can xarray dimension names with special-chars be utilized?](https://discourse.holoviz.org/t/can-xarray-dimension-names-with-special-chars-be-utilized/1831)

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**Author:** [@fmfreeze](https://discourse.holoviz.org/u/fmfreeze)\
**Replies:** 1\
**Last updated:** [February 8, 2021, 1:11pm UTC](https://discourse.holoviz.org/t/can-xarray-dimension-names-with-special-chars-be-utilized/1831 "2021-02-08T13:11:51Z")

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Having xarray datastructures as the source for panel + holoviews GUIs is awesome. One great thing is, that Dimension names are broadcasted directly from the xarray. But if xr DataVariables names are have special chars …