Mailman 3 July 2025 - yt-dev

2025 Higgs Centre Workshop videos
by Matthew Turk July 29, 2025

July 29, 2025

Hi folks, The videos from the 2025 yt Workshop at the Higgs Centre have now been posted: https://www.youtube.com/playlist?list=PL8tPWjc5gBfQLLvTK1G_48o_D6RgaLC48 There may be one or two new ones added, as we had some technical difficulties with a couple that the presenters intend to re-record. Thanks to everyone who organized, presented and attended -- it was really a ton of fun, and, on a personal note, really helped me feel connected with the community again. -Matt

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Question About Domain Decomposition in yt for Power Spectrum Analysis
by 林子祥 July 23, 2025

July 23, 2025

Hi all, At the yt workshop 2025, Matt and I discussed how to add a function to yt to analyse the matter power spectrum of a cosmological simulation. Based on Matt's suggestions, I tried using mpi4py-fft to handle the FFT with MPI. However, this library has specific requirements for the data decomposition. So, I need to understand how yt handles domain decomposition in order to proceed. Could someone point me to the relevant part of the code or documentation that describes yt’s domain decomposition strategy? Alternatively, any advice on how to interface yt’s data layout with mpi4py-fft would be greatly appreciated. Thanks in advance! Best regards, Edward

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awesome PR from Corentin for derived fields
by Matthew Turk July 16, 2025

July 16, 2025

Hi folks, I wanted to highlight this PR that Corentin Cadiou just issued: https://github.com/yt-project/yt/pull/5208 I love love love this syntax for adding new derived fields. Here's his example: --- ds = yt.load(...) ds.fields.gas.density_square = ds.fields.gas.density * ds.fields.gas.density ds.add_field(("gas", "double_density"), ds.fields.gas.density * 2) ds.r["gas", "density_square"] ds.r["gas", "double_density"] --- Check out the way he's using ds.fields.gas.density for input *and* he's assigning to ds.fields.gas.density_square. This is so much more user friendly. Corentin implemented this after the presentations at the Higgs workshop about defining derived fields. Even if we workshop this, fiddle around, whatever, I think this is a great concept that will be good for users both new and experienced! -Matt

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