dnest4-bilby

dnest4 plugin for bilby.

This plugin provides the dnest4 sampler in bilby.

Installation

This plugin is available via pip:

pip install dnest4-bilby

and conda:

conda install conda-forge:dnest4-bilby

Note: when installing via pip, you must install dnest4 separately.

Installing dnest4

dnest4 is available via conda, or can be installed from source following these instructions.

Caveats

• dnest4 no longer provides a Python interface
• The conda version of the dnest4 does not support numpy>2.0.
• Due to changes in numpy and Python that are incompatible with dnest4 this plugin is only tested with Python < 3.11. It may be possible to compile a working version of dynest4 with more recent numpy and Python versions but this has not been tested.
• This plugin is tested against dnest4 versions 0.2.4 and 0.3.3, the latest versions available via conda-forge and PyPI respectively.

Usage

Once dnest4-bilby is installed, the sampler can be used directly in bilby via the run_sampler function:

import bilby

likelihood = ...
priors = ...

bilby.run_sampler(
    sampler="dnest4",
    likelihood=likelihood,
    priors=priors,
    nlive=1000,
    ...
)

Usage with bilby_pipe

This plugin has not been tested with bilby_pipe.