Sökning: WFRF:(Bartoszek Krzysztof 1984 ) >
Uncertainty Estimat...
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Kiang, Woodrow Hao Chi,1993-Linköpings universitet,Statistik och maskininlärning,Filosofiska fakulteten
(författare)
Uncertainty Estimation in Models of Multivariate Trait Evolution on Given Phylogenies
Förlag, utgivningsår, omfång ...
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Linköping :Linköping University Electronic Press,2024
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43 s.
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electronicrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:liu-201907
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ISBN:9789180755894
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ISBN:9789180755900
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https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-201907URI
Kompletterande språkuppgifter
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Språk:engelska
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Sammanfattning på:engelska
Ingår i deldatabas
Klassifikation
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Ämneskategori:vet swepub-contenttype
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Ämneskategori:lic swepub-publicationtype
Varianttitlar
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Osäkerhetsuppskattning i modeller av multivariat dragevolution på givna fylogenier
Serie
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FiF-avhandling - Filosofiska fakulteten – Linköpings universitet,1401-4637 ;134
Anmärkningar
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Funding: Vetenskapsrådet [Grant 2017-04951] and STIMA.2024-04-05: Series have been corrected in the e-version
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Phylogenetic comparative methods are a set of statistical methods that model the evolutionary history of species, especially in the context where one has data on certain traits of related extant species that have evolved over a phylogenetic tree in accordance to an underlying stochastic process. This thesis presents a Hessian-based closed-form asymptotic confidence region that covers a wide family of Gaussian continuous-trait evolution models; the result has been implemented in an R package. Also, some analyses have been done on the simpler Brownian Motion and Ornstein-Uhlenbeck process cases; and this leads to novel exact confidence regions for the Brownian Motion’s parameters and a closed-form ’partial’ unbiased estimator for the Ornstein-Uhlenbeck process’ varaince-covariance matrix when other parameters are given. The thesis contains two papers. Paper I is an applied work that uses discrete-trait speciation and extinction model to investigate early spread of COVID-19; it shows that it is possible to detect statistical signals of inter-continental spread of the virus from a very noisy world-wide phylogeny. Paper II is a more mathematical work that derived the closed-form formulae for the Hessian matrix of a wide family of Gaussian-process-based multivariate continuous-trait PCM models; accompanying with the Paper I have developed an R package called glinvci, publicly available on The Comprehensive R Archive Network (CRAN), that can compute Hessian-based confidence regions for these models while at the same time allowing users to have missing data and multiple evolutionary regimes.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Bartoszek, Krzysztof,Associate Professor,1984-Linköpings universitet,Statistik och maskininlärning,Filosofiska fakulteten(Swepub:liu)krzba67
(preses)
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Ronquist, Fredrik,ProfessorNaturhistoriska riksmuseet, Stockholm, Sverige
(opponent)
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Linköpings universitetStatistik och maskininlärning
(creator_code:org_t)
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