Fast Threshold Clustering Algorithm (FTCA) test

November 28, 2013
By
Fast Threshold Clustering Algorithm (FTCA) test

Today I want to share the test and implementation for the Fast Threshold Clustering Algorithm (FTCA) created by David Varadi. This implementation was developed and contributed by Pierre Chretien, I only made minor updates. Let’s first replicate the results from the Fast Threshold Clustering Algorithm (FTCA) post: The clusters are stable and match David’s results […]

Read more »

PSMR 2014

November 27, 2013
By

Registration for the short course on Practical Statistics for Medical Research (PSMR) 2014 are now open. Here is the advert we've published on the BMJ with all the relevant information and details and even more info & details are here $-$ in case y...

Read more »

McKinsey Urban World App Reveals City Statistics on the Smart Phone

November 27, 2013
By
McKinsey Urban World App Reveals City Statistics on the Smart Phone

The Urban World App [mckinsey.com] by global management consulting firm McKinsey only runs on the iOS and Android operating systems. The smoothly animated application consists of an interactive, 3D globe that shows the population, income and GDP sta...

Read more »

Three unblinded mice

November 27, 2013
By
Three unblinded mice

Howard Wainer points us to a recent news article by Jennifer Couzin-Frankel, who writes about the selection bias arising from the routine use of outcome criteria to exclude animals in medical trials. In statistics and econometrics, this is drilled into us: Selection on x is OK, selection on y is not OK. But apparently in […]The post Three unblinded mice appeared first on Statistical Modeling, Causal Inference, and Social Science.

Read more »

“The probability that it be a statistical fluke” [iia]

November 27, 2013
By
“The probability that it be a statistical fluke” [iia]

My rationale for the last post is really just to highlight such passages as: “Particle physicists have agreed, by convention, not to view an observed phenomenon as a discovery until the probability that it be a statistical fluke be below 1 in a million, a requirement that seems insanely draconian at first glance.” (Strassler)…. Even […]

Read more »

Free NYU session on data visualization

November 27, 2013
By

As some of you may know, NYU is launching a Certificate in Analytics and Data Visualization, which I have helped put together. The course offerings are shown here. If you need to visualize data for work, this is the program...

Read more »

Importance sampling schemes for evidence approximation in mixture models

November 26, 2013
By
Importance sampling schemes for evidence approximation in mixture models

Jeong Eun (Kate) Lee and I completed this paper, “Importance sampling schemes for evidence approximation in mixture models“, now posted on arXiv. (With the customary one-day lag for posting, making me bemoan the days of yore when arXiv would give a definitive arXiv number at the time of submission.) Kate came twice to Paris in the past […]

Read more »

A Game Tree of Rafael Nadal’s Tennis Matches in Season 2013

November 26, 2013
By
A Game Tree of Rafael Nadal’s Tennis Matches in Season 2013

The Game Tree Interactive [gamesetmap.com] visualization by Damien Demaj analyzes the more than 600 service games played by Rafael Nadal during the Grand Slams, Masters 1000 and World Tour Finals in the year 2013. In particular, this visual summary sh...

Read more »

What’s your connection to the distant stars?

November 26, 2013
By

Many have thought motion somehow required the presence of other objects. Just like gravity requires two masses to exist, it seems like motion is meaningless in a universe with just one mass. This suggests inertia itself somehow requires other masses an...

Read more »

Statistical zealots

November 26, 2013
By
Statistical zealots

Yesterday my data sharing policy went a little bit viral. It hit the front page of Hacker News and was a trending repo on Github. I was reading the comments on Hacker News and came across this gem: So, while I … Continue reading →

Read more »

MCMSki IV, Jan. 6-8, 2014, Chamonix (news #12)

November 26, 2013
By
MCMSki IV, Jan. 6-8, 2014, Chamonix (news #12)

We are converging towards MCMSki IV getting closer and closer to the conference! I hope that by now all intended participants have registered (registration is still open!), found a place where to stay during and around the conference (still feasible!), and booked their flight to Geneva (or nearby). First, please send me asap the  poster abstract […]

Read more »

“Please make fun of this claim”

November 26, 2013
By

Jeff sent me an email with the above title and a link to a press release, “Nut consumption reduces risk of death,” which begins: According to the largest study of its kind, people who ate a daily handful of nuts were 20 percent less likely to die from any cause over a 30-year period than […]The post “Please make fun of this claim” appeared first on Statistical Modeling, Causal Inference,…

Read more »

For a change, the FDA earned my trust

November 26, 2013
By

I'm very excited to learn that the FDA has ordered 23andme to stop selling "personal genetic testing" to unsuspecting consumers. This is the company founded by the ex of Google's Sergei Brin (recent news here). So for a change, the FDA is doing something right for consumers, without waiting 10 or 15 years. Here is a report on this action in San Jose Mercury (link). These tests have never been…

Read more »

Data Analysis in Excel

November 26, 2013
By

Using a spreadsheet for doing data analysis can be very efficient but also due to the very flexible nature of a spreadsheet a little thought is required before filling cells with data. Typically when using a statistical software package data is loaded ...

Read more »

Not only verbs but also believes can be conjugated

November 26, 2013
By
Not only verbs but also believes can be conjugated

Following on from last week, where I presented a simple example of a Bayesian network with discrete probabilities to predict the number of claims for a motor insurance customer, I will look at continuos probability distributions today. Here I follow ex...

Read more »

getSymbols Extra

November 26, 2013
By
getSymbols Extra

The getSymbols function from the quantmod package is an easy and convenient way to bring historical stock prices into your R environment. You need to specify the list of tickers, the source of historical prices and dates. For example following commands will download historical stock prices from yahoo finance for ‘RWX’, ‘VNQ’, ‘VGSIX’ symbols: Now, […]

Read more »

Book review: Practical Data Analysis

November 25, 2013
By
Book review: Practical Data Analysis

Many people have drawn Venn diagrams to locate machine learning and related ideas in the intellectual landscape. Drew Conway’s diagram may have been the first. It has at least been frequently referenced. By this classification, Hector Cuesta’s new book Practical Data Anaysis is located toward the “hacking skills” corner of the diagram. No single book […]

Read more »

Getting Started with Mixed Effect Models in R

November 25, 2013
By

Getting Started with Multilevel Modeling in R Getting Started with Multilevel Modeling in R Jared E. Knowles Introduction Analysts dealing with grouped data and complex hierarchical structures in their data ranging from measu...

Read more »

Six Ways Coding Teaches Math

November 25, 2013
By
Six Ways Coding Teaches Math

Last week I attended the Computer-Based Mathematics Education Summit in New York City, run by Wolfram Research and hosted at UNICEF headquarters.The motivation behind the summit is explained by Conrad Wolfram in this TED talk.  His idea is that ma...

Read more »

Where Students Study Abroad via the European Erasmus Network

November 25, 2013
By
Where Students Study Abroad via the European Erasmus Network

Erasmus is an European Union student exchange program that allows more than 75.000 European students to travel abroad and study in a country different from their home. The network consists of over 2.900 universities, which are interconnected by over 9...

Read more »

An interesting but flawed attempt to apply general forecasting principles to contextualize attitudes toward risks of global warming

November 25, 2013
By
An interesting but flawed attempt to apply general forecasting principles to contextualize attitudes toward risks of global warming

I came across a document [updated link here], “Applying structured analogies to the global warming alarm movement,” by Kesten Green and Scott Armstrong. The general approach is appealing to me, but the execution seemed disturbingly flawed. Here’s how they introduce the project: The structured analogies procedure we [Green and Armstrong] used for this study was […]The post An interesting but flawed attempt to apply general forecasting principles to contextualize attitudes…

Read more »

TSA gets into the randomization game

November 25, 2013
By

Surprise surprise. On my way to and from Raleigh last week, I became part of a randomized experiment! At the entrance to the security check, there was a tablet (iPad?) perched on a stand that randomized passengers into the left line or the right line. I encountered the same setup on the return leg. On the outbound leg, I was assigned to the control group while on the trip back,…

Read more »


Subscribe

Email:

  Subscribe