2146 search results for "Twitter"

5 Sigma in CRU

September 4, 2010
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5 Sigma in CRU

UPDATE: Ron Broberg has a more definitive explanation of the difference which indicates that 5sig issue is not the main cause of the difference. See his exposition here A short update. I’m in the process of integration the Land Analysis and the SST analysis into one application. The principle task in front of me is integrating

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Oh (de)bugger! Part II

September 3, 2010
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Oh (de)bugger! Part II

In the first part of this series, I discussed some standard debugging techniques, like the use of the browser function. One of the limitations of browser is that it isn’t much help if the problem is somewhere higher up the call-stack. ... The function I’m going to show you uses sys.calls to retrieve the call stack, and sys.frames...

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Moshtemp4.0

September 3, 2010
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Moshtemp4.0

Now that SST has been processed with raster we can return to the land processing and put that on the same footing. To get there I’ll rebuild from scratch making some minor adjustments along the way. As we go foward the amount of code we have to write should become less and less because we

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NIPS 2010: Monte Carlo workshop

September 3, 2010
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NIPS 2010: Monte Carlo workshop

In the wake of the main machine learning NIPS 2010 meeting in Vancouver, Dec. 6-9 2010, there will be a very interesting workshop organised by Ryan Adams, Mark Girolami, and Iain Murray on Monte Carlo Methods for Bayesian Inference in Modern Day Applications, on Dec. 10. (And in Whistler, not Vancouver!) I wish I could

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Statisfaction

September 2, 2010
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Statisfaction

A collective blog has been started by the statistics students and postdocs at CREST, in the wake of the Valencia meeting. It is called Statisfaction. (The Rolling Stones of Statistics?! Actually, Andrew Gelman also has a post with that title… And it is even part of the Urban Dictionnary!) Since I have no responsability nor

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Third, and Hopefully Final, Post on Correlated Random Normal Generation (Cholesky Edition)

September 2, 2010
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Third, and Hopefully Final, Post on Correlated Random Normal Generation (Cholesky Edition)

When I did a brief post three days ago I had no plans on writing two more posts on correlated random number generation. But I’ve gotten a couple of emails, a few comments, and some Twitter feedback. In response to my first post, Gappy, calls me out and says, “the way mensches do multivariate (log)normal

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Stochastic approximation in Bristol

September 2, 2010
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Stochastic approximation in Bristol

This is very short notice, but for those in the vicinity and not at the RSS conference, there is a highly interesting workshop taking place in Bristol in ten days (I would certainly have gone, had I not been at the same time in Banff!): We would like to invite you to contribute to our

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Random dive MH

September 1, 2010
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Random dive MH

A new Metropolis-Hastings algorithm that I would call “universal” was posted by Somak Dutta yesterday on arXiv. Multiplicative random walk Metropolis-Hastings on the real line contains a different Metropolis-Hastings algorithm called the random dive. The proposed new value x’ given the current value x is defined by when is a random variable on . Thus,

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R is indispensable, because it’s reproducible

August 31, 2010
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Maria Wolters, self-styled "Science-Mum of two" and speech and language technology researcher, has a great blog post about the one tool she couldn't live without: R. Maria says R is her "favourite tool for analysing experimental results and modelling the resulting patterns of behaviour and preferences", and explains why: R is a programming language for everything statistical. It’s free,...

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Namespaces and name conflicts

August 31, 2010
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Namespaces and name conflicts

R packages ‘igraph’ and ‘network’ are good examples of two R packages providing similar but complementary functionalities for which there are a lot of name conflicts. As for now the ‘igraph’ package has a namespace while the ‘network’ package (version 1.4-1) does not. This became an issue when I was working on the ‘intergraph‘ package.

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