Category Archives: Astrostatistics

“Validation” of Bayesian posterior distributions …

Interesting paper by Harrison et al. on astro ph today under the title, “Validation of Bayesian posterior distributions using a multidimensional Kolmogorov-Smirnov test“.  The paper contains two proposed innovations: (1) use of the cumulative probability mass below a given likelihood … Continue reading

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Thinking about path integrals …

Been busy this past week running “micro-simulation” models for my day job; “micro-simulation” = build a computer code to simulate a whole population of people, send a swarm of simulated infectious mosquitos after them, and then simulate the process of … Continue reading

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The hyper-parameter method for unification of cosmological experiments …

I noticed a paper by Johnson et al. presenting cosmological constraints from the 6dF galaxy velocity survey on astro ph today.  What caught my eye here was their discussion of the “hyper-parameter method” for combined inference from a collection of … Continue reading

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Fisher matrices, functional regression, and stan …

Last week’s astro-ph mail out saw an interesting contribution by Heavens et al., who present a formula for computing the Fisher information of an experiment to estimate what appears to be the slope and coefficient of a linear regression model with … Continue reading

Posted in Astrostatistics, Infinite-Dimensional Inference | 12 Comments

Six key trends in contemporary statistics that really could revolutionise astronomical data analysis …

(2) the SPDE approach to large-scale random fields. Cosmologists have long been familiar with the statistics of random fields, owing in part to the prominent role of the Gaussian and log-Gaussian in models of the initial density perturbations (Bardeen et … Continue reading

Posted in Astrostatistics, Gaussian Processes, Infinite-Dimensional Inference, INLA, Statistics | 3 Comments

Six key trends in contemporary statistics that really could revolutionise astronomical data analysis …

With all the schools (Canary Islands, Penn State), conferences (IAUS306; 2013: Astroinformatics), books (S,MD,&ML in Astronomy), and articles (e.g. Hilbe 2014) hyping the potential of contemporary statistical methodology for revolutionising the practice of astronomy and astronomical data analysis you’d be forgiven for … Continue reading

Posted in Astrostatistics, Dirichlet Processes, Statistics | 2 Comments

More GPs for reconstructing H(z) …

It seems there’s quite a cottage industry for GP-based non-parametric modelling of H(z) using the cosmic chronometers supernova (SN) dataset: today on astro-ph we had a contribution by Verde et al., following on from Busti et al.’s effort last week. … Continue reading

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