# Posts Tagged ‘ University life ’

## Le Monde puzzle [#904.5]

March 25, 2015
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About this #904 arithmetics Le Monde mathematical puzzle: Find all plural integers, namely positive integers such that (a) none of their digits is zero and (b) removing their leftmost digit produces a dividing integer. a slight modification in the R code allows for a faster exploration, based on the fact that solutions add one extra […]

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## The synoptic problem and statistics [book review]

March 19, 2015
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A book that came to me for review in CHANCE and that came completely unannounced is Andris Abakuks’ The Synoptic Problem and Statistics.  “Unannounced” in that I had not heard so far of the synoptic problem. This problem is one of ordering and connecting the gospels in the New Testament, more precisely the “synoptic” gospels […]

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## the vim cheat sheet

March 18, 2015
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Filed under: Kids, Linux, R, University life, Wines Tagged: An Evil Guest, editor, unix, vim

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## amazing Gibbs sampler

February 18, 2015
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When playing with Peter Rossi’s bayesm R package during a visit of Jean-Michel Marin to Paris, last week, we came up with the above Gibbs outcome. The setting is a Gaussian mixture model with three components in dimension 5 and the prior distributions are standard conjugate. In this case, with 500 observations and 5000 Gibbs […]

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## MissData 2015 in Rennes [June 18-19]

February 9, 2015
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This (early) summer, a conference on missing data will be organised in Rennes, Brittany, with the support of the French Statistical Society [SFDS]. (Check the website if interested, Rennes is a mere two hours from Paris by fast train.)Filed under: R, ...

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## the density that did not exist…

January 26, 2015
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$the density that did not exist…$

On Cross Validated, I had a rather extended discussion with a user about a probability density as I thought it could be decomposed in two manageable conditionals and simulated by Gibbs sampling. The first component led to a Gumbel like density wirh y being restricted to either (0,1) or (1,∞) depending on β. The density […]

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## Sequential Monte Carlo 2015 workshop

January 22, 2015
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An announcement for the SMC 2015 workshop: Sequential Monte Carlo methods (also known as particle filters) have revolutionized the on-line and off-line analysis of data in fields as diverse as target tracking, computer vision, financial modelling, brain imagery, or population ecology. Their popularity stems from the fact that they have made possible to solve numerically many […]

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## simulation by inverse cdf

January 13, 2015
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$simulation by inverse cdf$

Another Cross Validated forum question that led me to an interesting (?) reconsideration of certitudes! When simulating from a normal distribution, is Box-Muller algorithm better or worse than using the inverse cdf transform? My first reaction was to state that Box-Muller was exact while the inverse cdf relied on the coding of the inverse cdf, like […]

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## top posts for 2014

December 29, 2014
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Here are the most popular entries for 2014: 17 equations that changed the World (#2) 995 Le Monde puzzle [website] 992 “simply start over and build something better” 991 accelerating MCMC via parallel predictive prefetching 990 Bayesian p-values 960 posterior predictive p-values 849 Bayesian Data Analysis [BDA3] 846 Bayesian programming [book review] 834 Feller’s shoes […]

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## the Grumble distribution and an ODE

December 2, 2014
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$the Grumble distribution and an ODE$

As ‘Og’s readers may have noticed, I paid some recent visits to Cross Validated (although I find this too addictive to be sustainable on a long term basis!, and as already reported a few years ago frustrating at several levels from questions asked without any preliminary personal effort, to a lack of background material to […]

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