Introducing Shift Register, My New Electronics Blog

April 27, 2016
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Introducing Shift Register, My New Electronics Blog

I have started a new blog, which I call shift register. It’s about electronics projects I’m doing, mostly building circuits on breadboards and playing with Arduinos. Electronics have been an interest of mine since I was a child. I played with electronics kits from a very early age, and as a teenager spent countless hours … Continue reading Introducing Shift Register, My New Electronics Blog

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High school student builds interactive R class for the intimidated with the JHU DSL

April 27, 2016
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Annika Salzberg is currently a biology undergraduate at Haverford College majoring in biology. While in high-school here in Baltimore she developed and taught an R class to her classmates at the Park School. Her interest in R grew out of a project wher...

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An update on Georgia Tech’s MOOC-based CS degree

April 27, 2016
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This article in Inside Higher Ed discusses next steps for Georgia Tech’s ground-breaking low-cost CS degree based on MOOCs run by Udacity. With Sebastian Thrun stepping down as CEO at Udacity, it seems both Georgia Tech and Udacity might be moving in...

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Estimer une Proportion sur une Question Sensible, par Enquête

April 26, 2016
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Estimer une Proportion sur une Question Sensible, par Enquête

Comme le rapportait Slate hier (dans un article qui, malheureusement ne mérite pas d’être lu), un joli sujet a été proposé au baccalauréat au lycée français de Pondichéry, en mathématiques. Ce sujet est d’autant plus intéressant qu’il revient sur une méthode assez classique pour questionner les gens sur des questions sensibles (ici sur le téléchargement pirate, mais on peut poser la même question sur la fraude, ou des pratiques sexuelles). Comme le…

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On Nested Models

April 26, 2016
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On Nested Models

We have been recently working on and presenting on nested modeling issues. These are situations where the output of one trained machine learning model is part of the input of a later model or procedure. I am now of the opinion that correct treatment of nested models is one of the biggest opportunities for improvement … Continue reading On Nested Models

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If Yogi Berra could see this one, he’d spin in his grave: Regression modeling using a convenience sample

April 26, 2016
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Kelvin Leshabari writes: We are currently planning to publish some few manuscripts on the outcome of treatment of some selected cancers occuring in children. The current dataset was derived from the natural admission process of those children with cancer found at a selected tertiary cancer centre. To the best of our understanding, our data are […] The post If Yogi Berra could see this one, he’d spin in his grave:…

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Talk on Causality with Non-Gaussian Time Series, at Paris 7 Diderot

April 26, 2016
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Talk on Causality with Non-Gaussian Time Series, at Paris 7 Diderot

This Monday, I will be giving a talk at Paris 7, room 1016 of the Sophie Germain building, on causality with non-Gaussian time series. Slides are now online.

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New R package to access World Bank data

April 26, 2016
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New R package to access World Bank data

Staying on top of new CRAN packages is quite a challenge nowadays. However, thanks to Dirk's CRANberries service I occasionally spot a new gem, such as wbstats, which appeared on CRAN last week. Similarly to the WDI package, wbstats offers an interface...

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I owe it all to my Neanderthal genes

April 25, 2016
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I owe it all to my Neanderthal genes

Yesterday I posted a methods-focused item at the Monkey Cage, a follow-up of a post from a couple years ago arguing against some dramatic claims by economists Ashraf and Galor regarding the wealth of nations. No big deal, just some standard-issue skepticism. But for some reason this one caught fire—maybe somebody important linked to it, […] The post I owe it all to my Neanderthal genes appeared first on Statistical…

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On deck this week

April 25, 2016
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Mon: I owe it all to my Neanderthal genes Tues: If Yogi Berra could see this one, he’d spin in his grave: Regression modeling using a convenience sample Wed: 64 Shades of Gray: The subtle effect of chessboard images on foreign policy polarization Thurs: Integrating graphs into your workflow Fri: Gary Venter’s age-period-cohort decomposition of […] The post On deck this week appeared first on Statistical Modeling, Causal Inference, and…

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Matrix computations at SAS Global Forum 2016

April 25, 2016
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Matrix computations at SAS Global Forum 2016

Last week I attended SAS Global Forum 2016 in Las Vegas. I and more than 5,000 other attendees discussed and shared tips about data analysis and statistics. Naturally, I attended many presentations that featured using SAS/IML software to implement advanced analytical algorithms. Several speakers showed impressive mastery of SAS/IML programming […] The post Matrix computations at SAS Global Forum 2016 appeared first on The DO Loop.

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Spreadsheet Thinking vs. Database Thinking

April 25, 2016
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Spreadsheet Thinking vs. Database Thinking

The shape of a dataset is hugely important to how well it can be handled by different software. The shape defines how it is laid out: wide as in a spreadsheet, or long as in a database table. Each has its use, but it’s important to understand their differences and when each is the right choice. Wide … Continue reading Spreadsheet Thinking vs. Database Thinking

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The Distribution of Global Economic Activity…

April 24, 2016
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The Distribution of Global Economic Activity…

... as proxied by the global distribution of nighttime lights (from a fascinating new paper by Hendersen et al.).  Like many good graphics, this one repays careful study.  You'll see lots of places where the lights match your prior, but you'l...

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Risk aversion is a two-way street

April 24, 2016
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Risk aversion is a two-way street

“Risk aversion” comes up a lot in microeconomics, but I think that it’s too broad a concept to do much for us. In many many cases, it seems to me that, when there is a decision option, either behavior X or behavior not-X can be thought as risk averse, depending on the framing. Thus, when […] The post Risk aversion is a two-way street appeared first on Statistical Modeling, Causal…

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What is the “true prior distribution”? A hard-nosed answer.

April 23, 2016
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The traditional answer is that the prior distribution represents your state of knowledge, that there is no “true” prior. Or, conversely, that the true prior is an expression of your beliefs, so that different statisticians can have different true priors. Or even that any prior is true by definition, in representing a subjective state of […] The post What is the “true prior distribution”? A hard-nosed answer. appeared first on…

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Stochastic natural-gradient EP

April 22, 2016
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Yee Whye Teh sends along this paper with Leonard Hasenclever, Thibaut Lienart, Sebastian Vollmer, Stefan Webb, Balaji Lakshminarayanan, and Charles Blundell. I haven’t read it in detail but they not similarities to our “expectation propaga...

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Sharp-R Time Series

April 22, 2016
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This is the second part in a series of posts on the flexibility of our Excel Add In Sharp-R, that allows functions defined in R code to be run on data in any Excel worksheet. Part one looked as exploratory data analysis. This post deals with time serie...

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The causal inference competition you’ve all been waiting for!

April 21, 2016
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Jennifer Hill announces “the first-ever ACIC causal inference data analysis competition”: Is your SATT where it’s at? Participate by submitting treatment effect estimates across a range of datasets OR by submitting a function (in any of a variety of programming languages) that will take input (covariate, treatment assignment, and response) and generate a treatment effect […] The post The causal inference competition you’ve all been waiting for! appeared first on…

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Introducing fidlr: FInancial Data LoadeR

April 21, 2016
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Introducing fidlr: FInancial Data LoadeR

fidlr is an RStudio addin designed to simplify the financial data downloading process from various providers. This initial version is a wrapper around the getSymbols function in the quantmod package and only Yahoo, Google, FRED and Oanda are supported. I will probably add functionalities over time. As usual with those things just a kind reminder: “THE SOFTWARE […]

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Principal curves example (Elements of Statistical Learning)

April 21, 2016
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Principal curves example (Elements of Statistical Learning)

The bit of R code below illustrates the principal curves methods as described in The Elements of Statistical Learning, by Hastie, Tibshirani, and Friedman (Ch. 14; the book is freely available from the authors' website). Specifically, the code generates some bivariate data that have a nonlinear association, initializes the principal curve using the first (linear) principal … Continue reading Principal curves example (Elements of Statistical Learning) →

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A new idea for a science core course based entirely on computer simulation

April 21, 2016
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I happen to come across this post from 2011 that I like so much, I thought I’d say it again: Columbia College has for many years had a Core Curriculum, in which students read classics such as Plato (in translation) etc. A few years ago they created a Science core course. There was always some […] The post A new idea for a science core course based entirely on computer…

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Workshop on Infectious Disease Modelling in Public Health Policy: Current status and challenges (again)

April 21, 2016
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We've had a fantastic response to the workshop. In just a few days of public advertisement (I firstly posted about it and then advertised on allstat and HEALTHECON-ALL) we got 65 registration, as of today. We have provisionally set out 100 "t...

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Write papers like a modern scientist (use Overleaf or Google Docs + Paperpile)

April 21, 2016
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Write papers like a modern scientist (use Overleaf or Google Docs + Paperpile)

Editor’s note - This is a chapter from my book How to be a modern scientist where I talk about some of the tools and techniques that scientists have available to them now that they didn’t before. Writing - what should I do and why? Write using co...

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