UltraNest

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LinAlgError: degenerate live points / singular matrix with Metropolis sampler

22

* UltraNest version: 3.2.0 * Python version: 3.8 * Operating System: Windows subsystem for Linux ### Description Around 10000 iterations into a model fit using the RegionMHSampler (nsteps=10) I get...

Jammy2211

Model comparison example typo

1

In the [model comparison example](https://johannesbuchner.github.io/UltraNest/example-sine-modelcomparison.html) the comment above the prior transform for the period says it goes from 0.3 to 30, when the actual prior transform goes from 1 to...

mattpitkin

Ultranest sets up logging like a standalone application, not a library

10

* UltraNest version: 3.2.1 * Python version: 3.9.5 * Operating System: Mac OS Catalina Thank you for Ultranest as it is an incredible nested sampling library -- very fast and...

jpl-jengelke

cython requirement warning

1

In setup.py, when the `from Cython.Build import cythonize` import fails, we should display a nice error message to the user, saying "please install cython first".

JohannesBuchner

Fix verbose options

3

"outputkwargs" dictionary should be passed when calling the "run" method, not when initializing the sampler. Otherwise calling to "pymultinest_solve_compat" fails if verbose=False

ruizca

4.1.6 performs worse

15

@JohannesBuchner doing cross comparison with mutliple NS implementations I found that upgrading to 4.1.6 from 3.5 decreased performance, and introduced strange performance scaling, e.g. `max_num_improvement_loops=0` sometimes more efficient that `max_num_improvement_loops=-1`,...

Joshuaalbert

vectorised slice sampler of fixed batch size

2

I did some updates before creating the merge request. I changed the names of the function for PopulationSimpleSliceSampler as a working name, and I made some modifications regarding your second...

njzifjoiez

Feature request: HDI intervals

6

Bayesian credible intervals can currently be derived using quantiles. Would it be possible to implement an HDI interval as well?

JorisDeRidder

Add ESS calculation to static version results

1

@JohannesBuchner we really need you to add ESS to the static implementation results, when `num_live_points>0` for cross comparison in a paper. Can you quickly add this, or point me how...

Joshuaalbert

Ultranest version 4

4

Dear users, you recently interacted with UltraNest on github. I just pushed a new version, 4.1, to conda and pypi. You can find the changes and merged pull requests (huge...

JohannesBuchner