polychord: next-generation nested sampling
polychord is a novel nested sampling algorithm tailored for high-dimensional parameter spaces. This paper coincides with the release of polychord v1.6, and provides an extensive account of the algorithm. polychord utilizes slice sampling at each iteration to sample within the hard likelihood constra...
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| Published in: | Monthly notices of the Royal Astronomical Society Vol. 453; no. 4; pp. 4384 - 4398 |
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| Main Authors: | , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
London
Oxford University Press
11.11.2015
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| Subjects: | |
| ISSN: | 0035-8711, 1365-2966 |
| Online Access: | Get full text |
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| Abstract | polychord is a novel nested sampling algorithm tailored for high-dimensional parameter spaces. This paper coincides with the release of polychord v1.6, and provides an extensive account of the algorithm. polychord utilizes 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 parallelized using openmpi. It is capable of exploiting a hierarchy of parameter speeds such as those present in cosmomc and camb, and is now in use in the cosmochord and modechord codes. polychord is available for download from http://ccpforge.cse.rl.ac.uk/gf/project/polychord/. |
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| AbstractList | POLYCHORD is a novel nested sampling algorithm tailored for high-dimensional parameter spaces. This paper coincides with the release of POLYCHORD v1.6, and provides an extensive account of the algorithm. POLYCHORD utilizes 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 parallelized using OPENMPI. It is capable of exploiting a hierarchy of parameter speeds such as those present in COSMOMC and CAMB, and is now in use in the COSMOCHORD and MODECHORD codes. POLYCHORD is available for download from http://ccpforge.cse.rl.ac.uk/gf/project/polychord/. |
| Author | Hobson, M. P. Lasenby, A. N. Handley, W. J. |
| Author_xml | – sequence: 1 givenname: W. J. surname: Handley fullname: Handley, W. J. organization: 1Astrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UK – sequence: 2 givenname: M. P. surname: Hobson fullname: Hobson, M. P. organization: 1Astrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UK – sequence: 3 givenname: A. N. surname: Lasenby fullname: Lasenby, A. N. email: a.n.lasenby@mrao.cam.ac.uk organization: 1Astrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UK |
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| Copyright | 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society 2015 Copyright Oxford University Press, UK Nov 11, 2015 |
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| Snippet | polychord is a novel nested sampling algorithm tailored for high-dimensional parameter spaces. This paper coincides with the release of polychord v1.6, and... POLYCHORD is a novel nested sampling algorithm tailored for high-dimensional parameter spaces. This paper coincides with the release of POLYCHORD v1.6, and... |
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| SubjectTerms | Algorithms Astronomy Computation Cosmology Downloading Evolution Hierarchies Parallel processing Sampling |
| Title | polychord: next-generation nested sampling |
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