PolyChord: nested sampling for cosmology

W. J. Handley, M. P. Hobson, A. N. Lasenby
2/6/2015
astro-ph.COastro-ph.IM

Official code: PolyChord/PolyChordLite (101 stars, last commit 2026-02-26). 1 more implementation below.

Abstract

PolyChord is a novel nested sampling algorithm tailored for high dimensional parameter spaces. In addition, it can fully exploit a hierarchy of parameter speeds such as is found in CosmoMC and CAMB. It utilises slice sampling at each iteration to sample within the hard likelihood constraint of nested sampling. It can identify and evolve separate modes of a posterior semi-independently and is parallelised using openMPI. PolyChord is available for download at: http://ccpforge.cse.rl.ac.uk/gf/project/polychord/

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Code Implementations(2)

PolyChord/PolyChordLiteOfficial100%

Public version of PolyChord: See polychord.co.uk for PolyChordPro

10135C, C++Oct 10, 20187 months agoNOASSERTION
astronomybayesian-inferencecosmologygfortranlog-likelihood+8 more
williamjameshandley/CosmoChordOfficial100%

Cosmological sampling with PolyChord + CosmoMC

76C, TeXNov 21, 20182 years ago

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Cite this paper

@article{handley2015polychord,
  title  = {PolyChord: nested sampling for cosmology},
  author = {W. J. Handley and M. P. Hobson and A. N. Lasenby},
  year   = {2015},
  eprint = {1502.01856},
  archivePrefix = {arXiv},
  url    = {https://arxiv.org/abs/1502.01856}
}

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