Bayesian Confirmation Philosophy and the Tacking Paradox (iv)*

October 20, 2013
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Bayesian Confirmation Philosophy and the Tacking Paradox (iv)*

*addition of note [2]. A long-running research program in philosophy is to seek a quantitative measure C(h,x) to capture intuitive ideas about “confirmation” and about “confirmational relevance”. The components of C(h,x) are allowed to be any statements, no reference to a probability model or to joint distributions are required. Then h is “confirmed” or supported […]

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R2jags & BCEA (& the examples from BMHE)

October 19, 2013
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Recently, Yu-Sung Su and Masanao Yajima, the developers of the R2jags package, have released a new version (the current one is 0.03-11). As far as I understand it, one of the main changes is that since the update, R2jags no longer depend...

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Waiting for Don’t Panic

October 19, 2013
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Waiting for Don’t Panic

‘Internationally acclaimed Swedish Professor Hans Rosling will present Don’t Panic – The Truth About Population, an ‘as-live’ studio event featuring …Continue reading →

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R package for effect size calculations for psychology researchers

October 19, 2013
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Dan Gerlanc writes: I read your post the other day [now the other month, as our blog is on a bit of a delay] on helping psychologists do research and thought you might be interested in our R package, “bootES”, for robust effect size calculation and confidence interval estimation using resampling techniques. The package provides […]The post R package for effect size calculations for psychology researchers appeared first on Statistical…

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Carry-over balanced designs for 8 treatments

October 19, 2013
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Those are Williams designs you might say, but it has become clear to me that Williams designs are just a subset of all carry-over balanced designs. Not through hard work of mine, comments by Apn on my previous post Creating Williams designs with e...

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Markdown or LaTeX?

October 19, 2013
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Markdown or LaTeX?

What happens if you ask for too much power from Markdown? R Markdown is one of the document formats that knitr supports, and it is probably the most popular one. I have been asked many times about the choice between Markdown and LaTeX, so I think I'...

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Open sourcing movide, a student-centric learning platform

October 18, 2013
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Open sourcing movide, a student-centric learning platform

I haven’t blogged in a while, mostly because I have been trying to figure out what I should do next. One thing that I have been working on lately that I am very passionate about is Movide. Movide is a student-centric learning platform. You mig...

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Subsidies, Revenues, and Expenses of NCAA Division I Public Schools Athletic Departments – Visualizations using rCharts and animint generated interactive ggplots

October 18, 2013
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UPDATE: THE BLOG/SITE HAS MOVED TO GITHUB. THE NEW LINK FOR THE BLOG/SITE IS patilv.github.io and THE LINK TO THIS POST IS: http://bit.ly/1obVGLS. PLEASE UPDATE ANY BOOKMARKS YOU MAY HAVE.Two interesting articles in recent issues of The Atlantic linked...

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Trading Strategies Performance Report with R and Knitr

October 18, 2013
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Trading Strategies Performance Report with R and Knitr

I’ve been looking for template reports using R and Knitr for a while but I didn’t find anything that suits my needs so far. I therefore decided to create them myself. What I like to see about trading strategies are basic performance charts (daily, monthly and yearly), some basic trading statistics and above all most […]

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Open sourcing movide, a student-centric learning platform

October 18, 2013
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Open sourcing movide, a student-centric learning platform

I haven't blogged in a while, mostly because I have been trying to figure out what I should do next. One thing that I have been working on lately that I am very passionate about is Movide. Movide is a student-centric learning platform. You might yawn at this point and wonder why Movide matters. It's a natural reaction, given the crowded learning tools marketplace. Movide, matters, I think, because it…

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EP and ABC

October 18, 2013
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EP and ABC

Expectation propagation and approximate Bayesian computation. Here are X’s comments on a paper, “Expectation-Propagation for Likelihood-Free Inference,” by Simon Barthelme and Nicolas Chopin. The paper is not new but the topic is still hot. Also there’s this paper by Maurizio Filippone and Mark Girolami on computation for Gaussian process models. I wonder how this connects […]The post EP and ABC appeared first on Statistical Modeling, Causal Inference, and Social Science.

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Platforms and Integration in Statistical Research (Part 2/2)

October 18, 2013
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In my last post, I talked about two general approaches to conducting statistical research: platforms and integration. In this followup I thought I'd describe the characteristics of certain fields that suggesting taking one approach over another. I think in practice, … Continue reading →

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Rotating matrices

October 18, 2013
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Rotating matrices

This article is about rotating matrices. No, I don't mean "rotation matrices," I mean rotating matrices. As in turning a matrix 90 degrees in a clockwise or counterclockwise direction. I was reading a program written in MATLAB in which the programmer used a MATLAB function called ROT90, which rotates a [...]

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G+ hangout for Bayesian Data Analysis course now! (actually, in 5 minutes)

October 18, 2013
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Here’s the link. When you’re on the hangout, please mute your own microphone! I’ll have the computer point at the blackboard. You can follow along with the slides: for the first hour for the second hour P.S. Apparently there is some limit on number of hangout participants (see comments). I didn’t know about that! Maybe […]The post G+ hangout for Bayesian Data Analysis course now! (actually, in 5 minutes) appeared…

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Three jobs at Monash

October 18, 2013
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Three jobs at Monash

We are currently advertising for three academic positions, suitable for recent PhD graduates. Lecturer (Applied Statistics or Operations Research) Five-year position with MAXIMA and the School of Mathematical Sciences Two positions available. Applicat...

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drawing surface plots on the IR³ simplex

October 17, 2013
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drawing surface plots on the IR³ simplex

As a result of a corridor conversation in Warwick, I started looking at distributions on the IR³ simplex, and wanted to plot the density in a nice way. As I could not find a proper package on CRAN, the closer being the BMAmevt (for Bayesian Model Averaging for Multivariate Extremes) R package developed by a […]

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P-value fallacy alive and well: Latest case in Scientific Reports

October 17, 2013
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P-value fallacy alive and well: Latest case in Scientific Reports

Erratum (10/17/13): The paper was published in Scientific Reports, an OA journal from the publishers of Nature, and not in the Journal Nature as originally reported. Clarification (10/17/13): The paper discussed here is quite good overall and very interesting. I do not believe that anything in this post calls into question any of its main […]

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What R Has Been Missing

October 17, 2013
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What R Has Been Missing

While R has more methods than any other analytics software, it has been missing a crucial feature found in most other packages. SPSS Modeler had it first, way back when they still called it Clementine. Then SAS Institute realized how crucial … Continue reading →

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The @fivethirtyeight effect – watching @walthickey gain Twitter followers in real time

October 17, 2013
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The @fivethirtyeight effect – watching @walthickey gain Twitter followers in real time

Last night Nate Silver announced that he had hired Walt Hickey away from Business Insider to be an editor for the new http://www.fivethirtyeight.com/ website with a couple of tweets: Super excited to announce that 538 is hiring @WaltHickey, the talented young … Continue reading →

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Cool dynamic demographic maps provide beautiful illustration of Chris Rock effect

October 17, 2013
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Cool dynamic demographic maps provide beautiful illustration of Chris Rock effect

Robert Gonzalez reports on some beautiful graphs from John Nelson. Here’s Nelson:   The sexes start out homogenous, go super segregated in the teen years, segregate for business in the twenty-somethings, and re-couple for co-habitation years.  Then the lights fade into faint pockets of pink.   I [Nelson] am using simple tract-level population/gender counts from […]The post Cool dynamic demographic maps provide beautiful illustration of Chris Rock effect appeared first…

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beta HPD

October 17, 2013
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beta HPD

While writing an introductory chapter on Bayesian analysis (in French), I came by the issue of computing an HPD region when the posterior distribution is a Beta B(α,β) distribution… There is no analytic solution and hence I resorted to numerical resolution (provided here for α=117.5, β=115.5): and got the following return: which was enough for […]

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G+ hangout for test run of BDA course

October 17, 2013
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Try this link. . . . OK, it worked (as well as might be expected given that we don’t have any professional audiovisual people involved). Tomorrow 8h30, I’ll post a new link with the new G+ hangout. We’ll be going through the first two sets of slides (class1a.pdf and class1b.pdf) following the link for the […]The post G+ hangout for test run of BDA course appeared first on Statistical Modeling,…

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Cont model back after a year

October 16, 2013
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Cont model back after a year

During ESSA2013 conference I had a discussion about Cont model I have commented a year ago.In original paper Cont highlights that his model produces distribution of returns characterized by positive excess kurtosis. In this post I want to investig...

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