the yt project's blog
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Updates from yt-napari
yt-napari has seen a number of new features, performance improvements and new documentation in the past year or so. Read on to find out more!
New in 4.1: Loading data with functions
There’s a new feature in yt 4.1 that lets you load data using just functions, without it needing to be in memory or to have its own frontend defined.
Back in the long, long distant past, the Stream frontend was created to make it easy to bring data into yt without writing a full-on “frontend.” Originally this was to make it easy to share data between VTK and yt – and it worked!
New in 4.1: Loading data with functions
Building on our ability to read data using just functions, we can now load data from raw HDF5 files with a minimum of metadata.
I’ve heard it said that HDF5 isn’t exactly a file-format. Sure, it describes how to write bits down (and does this extremely well and thoroughly), but I have always personally found it to be more immediately useful as a filesystem for data. And, it seems that people who write data to disk find it to be similarly useful – but there’s no single way that people organize the data they use HDF5 to write to disk, attempts at metadata notwithstanding.
My semester working on yt-idv through NCSA SPIN
A brief overview of my contributions to yt-idv this past semester.
PhasePlots are the Best Plots
A story on why I love PhasePlots.
Contributing to the yt Blog!
Do you have:
- A new feature that you think is interesting?
- A way that you use yt that you think others would like?
- A tutorial on how to replicate your analysis?
- A neat application for yt?
Consider contributing to the blog! Here’s how to do it!
Dask and yt: a pre-YTEP
An update and proposal on continuing development of Dask and yt.
A yt-napari party
Interactive visualization of yt data using napari?
Line Integral Convolution for Vector Field Visualization
How to visualize a line integral convolution for a vector field with yt
Much Ado About Governance
A new post about our project’s governance!
Relicensing yt from GPLv3 to BSD
Our reasoning for switching licenses for the yt-project
Obj File Exporter for Surfaces
How to export surfaces into an obj file (will it blend?!)
The first yt development workshop!
On March 6-8, 2013 we held a yt development workshop at UCSC. Let’s talk about it!
yt 2.5 released!
Announcing yt 2.5!
Announcing the 2013 yt development workshop
Announcing the 2013 yt developer workshop!
Particle Generators
This post shows how to generate particle fields from pre-defined particle lists, lattice distributions, and distributions based on density fields.
2012 In Review
What was 2012 like for the yt community? Let’s look back together!
3D Surfaces and Sketchfab
Let’s talk about exporting surfaces to sketchfab with yt!
The Rockstar Halo Finder in yt
Over the last few weeks, Matt Turk, Christopher Moody, and Stephen Skory have been working to improve the integration of the Rockstar halo finder in yt. Rockstar was written primarily by Peter Behroozi and has a main website here. Linked there is the source and the most current edition of the method paper which includes a timing and scaling study.
Rockstar is a six dimensional halo finder, meaning that it considers both particle position and momentum when locating dark matter halos.
What's up with yt 3.0?
This is a long blog post! The short of it is:
If you’re using Enzo or FLASH, you can probably do most of what you want to do with 3.0. But there are probably bugs, and you can’t volume render yet. But every bug or missing feature you find is a useful piece of information that can help speed up development. If you’re using RAMSES, 3.0 will be a vast improvement!
Our New Blog
We’ve got a new blog! Here’s a post that talks about the changes we’ve made and how we expect to move forward!
Simple Grid Refinement
Notebook Download
Grid refinement In yt, you can now generate very simple initial conditions:
In[1]:
from yt.mods import * from yt.frontends.stream.api import load_uniform_grid from yt.frontends.gdf.api import * from yt.utilities.grid_data_format.writer import write_to_gdf class DataModifier(object): pass class TophatSphere(DataModifier): def __init__(self, fields, radius, center): self.fields = fields self.radius = radius self.center = center def apply(self, grid, container): r = ((grid['x'] - self.center[0])**2.0 + (grid['y'] - self.center[1])**2.0 + (grid['z'] - self.center[2])**2.0)**0.5 for field in self.
yt 2.4 released!
We’re proud to announce the release of version 2.4 of the yt Project, http://yt-project.org/ . The new version includes many new features, refinements of existing features and numerous bugfixes. We encourage all users to upgrade to take advantage of the changes.
yt is a community-developed analysis and visualization toolkit, primarily directed at astrophysical hydrodynamics simulations. It provides full support for output from the Enzo, FLASH, Orion, and Nyx codes, with preliminary support for several others.
yt Google+ Hangout tomorrow!
Tomorrow we’re going to try something new – Google Hangouts! If you’d like help with something, to share some feedback, or just to say hi to other community members, stop by Tuesday, May 1st. We’ll be starting up around 2PM Eastern and continuing for a couple hours.
If this works out, we’ll try it again from time to time, to catch up on new developments, help out with scripts or visualization issues, soliciting feedback, and to chat about using and developing yt.
What's new with yt?
Now that the post-workshop preparations and work have settled down, I thought it might be interesting to share some of the developments going on with yt. We’re still a long way from a new release, so these interim ‘development’ updates are meant to be a bit of a teaser. As always, these features are either in the main branch or (if noted) in a public fork on BitBucket. If they sound interesting, drop us a line on `yt-dev <http://lists.
Aboout the yt Project
Want to contribute a post? Check out our contributor guide
Check out our documentation here
The yt-project homepage
Our quickstart notebooks on getting started
The yt source repository
yt extension modules
yt has many extension packages to help you in your scientific workflow! Check these out, or create your own.
ytini
ytini is set of tools and tutorials for using yt as a tool inside the 3D visual effects software Houdini or a data pre-processor externally to Houdini.
Trident
Trident is a full-featured tool that projects arbitrary sightlines through astrophysical hydrodynamics simulations for generating mock spectral observations of the IGM and CGM.
pyXSIM
pyXSIM is a Python package for simulating X-ray observations from astrophysical sources.
ytree
Analyze merger tree data from multiple sources. It’s yt for merger trees!
yt_idv
yt_idv is a package for interactive volume rendering with yt! It provides interactive visualization using OpenGL for datasets loaded in yt. It is written to provide both scripting and interactive access.
widgyts
widgyts is a jupyter widgets extension for yt, backed by rust/webassembly to allow for browser-based, interactive exploration of data from yt.
yt_astro_analysis
yt_astro_analysis is the yt extension package for astrophysical analysis.
Make your own!!
Finally, check out our development docs on writing your own yt extensions!
Contributing to the Blog
Are you interested in contributing to the yt blog?
Check out our post on contributing to the blog for a guide!
We welcome contributions from all members of the yt community. Feel free to reach out if you need any help.
the yt data hub
The yt hub at https://girder.hub.yt/ has a ton of resources to check out, whether you have yt installed or not.
The collections host all sorts of data that can be loaded with yt. Some have been used in publications, and others are used as sample frontend data for yt. Maybe there’s data from your simulation software?
The rafts host the yt quickstart notebooks, where you can interact with yt in the browser, without needing to install it locally. Check out some of the other rafts too, like the widgyts release notebooks – a demo of the widgyts yt extension pacakge; or the notebooks from the CCA workshop – a user’s workshop on using yt.