biblatex for statisticians

August 22, 2014
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biblatex for statisticians

I am now using biblatex for all my bibliographic work as it seems to have developed enough to be stable and reliable. The big advantage of biblatex is that it is easy to format the bibliography to conform to specific journal or publisher styles. It is also possible to have structured bibliographies (e.g., divided into sections: books, papers, R packages, etc.) Here is my default setting which should be suitable…

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Risk Analysis for Three Precious Metals

August 21, 2014
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Risk Analysis for Three Precious Metals

Qinlu (Louisa) Chen and I have recently completed a paper titled, "Risk Analysis for Three Precious Metals: An Application of Extreme Value Theory". It's based in part on work that Louisa undertook in her B.Sc. Honours program here at UVic.Here's the a...

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Come hear me talk about A/B Testing next Tuesday #optimizely

August 21, 2014
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Coming Tuesday, I'm talking about A/B Testing at the Optimizely Experience event in New York. It's at the Intrepid Museum, a great setting. My talk will address questions that come up frequently in practice when you start doing a lot of online experiments. Testing is one big area of business analytics, and an area in which practical experience has to complement textbook learning. Hope to see you there. You can…

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Extracting Latent Variables from Rating Scales: Factor Analysis vs. Nonnegative Matrix Factorization

August 21, 2014
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Extracting Latent Variables from Rating Scales: Factor Analysis vs. Nonnegative Matrix Factorization

For many of us, factor analysis provides a gateway to learning how to run and interpret nonnegative matrix factorization (NMF). This post will analyze a set of ratings on a 218 item adjective checklist using both principal axis factor analysis and NMF....

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The Feltron Annual Report of 2013 on Communication

August 21, 2014
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The Feltron Annual Report of 2013 on Communication

Each year, Nicholas Felton releases an personal year report, and the one of 2013 [feltron.com] was just released. These reports always stand out because of the immense sense of data-centric detail, and an always original infographic style. This year...

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The field is a fractal

August 21, 2014
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In a blog comment, Winston Lin points to this quote from Bill Thurston: There is a real joy in doing mathematics, in learning ways of thinking that explain and organize and simplify. One can feel this joy discovering new mathematics, rediscovering old mathematics, learning a way of thinking from a person or text, or finding […] The post The field is a fractal appeared first on Statistical Modeling, Causal Inference,…

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Explanation of laxity

August 21, 2014
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Been a little light on the postings recently. Here is why:

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A (very) brief review of published human subjects research conducted with social media companies

August 20, 2014
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As I wrote the other day, more and more human subjects research is being performed by large tech companies. The best way to handle the ethical issues raised by this research is still unclear. The first step is to get some … Continue reading →

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Converting combination of random variables to hierarchical form for JAGS (BUGS, Stan, etc.)

August 20, 2014
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Converting combination of random variables to hierarchical form for JAGS (BUGS, Stan, etc.)

An emailer asks:Hi, John. Long-time listener, first-time caller... I have a model that says X is a function of three (independent) random variables: X ~ normal(mu, sigma) / uniform(a,a+b) - beta(v,w) and I also have N random samples of X. Can I use JAG...

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Do your "data janitor work" like a boss with dplyr

August 20, 2014
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Do your "data janitor work" like a boss with dplyr

Data “janitor-work”The New York Times recently ran a piece on wrangling and cleaning data:“For Big-Data Scientists, ‘Janitor Work’ Is Key Hurdle to Insights”Whether you call it “janitor-work,” wrangling/munging, cleaning/cleansing/scru...

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“A hard case for Mister P”

August 20, 2014
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Kevin Van Horn sent me an email with the above title (ok, he wrote MRP, but it’s the same idea) and the following content: I’m working on a problem that at first seemed like a clear case where multilevel modeling would be useful. As I’ve dug into it I’ve found that it doesn’t quite fit […] The post “A hard case for Mister P” appeared first on Statistical Modeling, Causal…

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Mind your Qs

August 20, 2014
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Mind your Qs

Rescheduling Notice: I have been informed by the organizers that the Meetup tonight has to be rescheduled due to an unexpected problem with the venue. When a new date is set, I will let you know. *** Since I am...

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Workshop on Efficient Methods for Value of Information

August 20, 2014
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Nicky Welton has invited me to talk at a very interesting workshop, which she has organised at the University of Bristol (here's a flyer). The day will be about the recent (and current) development of methods to perform calculations of the expected val...

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Creating heat maps in SAS/IML

August 20, 2014
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Creating heat maps in SAS/IML

In a previous blog post, I showed how to use the graph template language (GTL) in SAS to create heat maps with a continuous color ramp. SAS/IML 13.1 includes the HEATMAPCONT subroutine, which makes it easy to create heat maps with continuous color ramps from SAS/IML matrices. Typical usage includes […]

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R Passes SPSS in Scholarly Use, Stata Growing Rapidly

August 20, 2014
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R Passes SPSS in Scholarly Use, Stata Growing Rapidly

by Robert A. Muenchen Here is my latest update to The Popularity of Data Analysis Software. To save you the trouble of reading all 25 pages of that article, the new section is below. The two most interesting nuggets it contains are: … Continue reading →

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Recent Articles

August 20, 2014
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Recent Articles

  I have uploaded a few papers I have written and presented at some national conferences over the past several years.  Currently, all the articles relate to election research.

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Gordon Linoff and Michael Berry Interviewed for JMP’s Analytically Speaking Series

August 19, 2014
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On August 13th, Anne Milley of JMP interviewed us for the webcast series, Analytically Speaking. The full program is available for viewing here. We discussed a range of topics including the upcoming supplement to Data Mining Techniques (3rd Edition). T...

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The Bracken Bower Prize

August 19, 2014
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The Bracken Bower Prize

The Bracken Bower Prize is a new initiative that's intended to motivate younger authors to identify and analyse future business trends. It's an important award that could well be of interest to applied econometricians, so here are the details that were...

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David Mimno on "Data Carpentry"

August 19, 2014
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David Mimno on "Data Carpentry"

There's a post on David Mimno's blog  today titled, "Data Carpentry".I like it a lot, because it emphasises just how much effort, time and creativity can be required in order to get one's data in order before we can get on with the fun stuff ...

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SwiftKey and Johns Hopkins partner for Data Science Specialization Capstone

August 19, 2014
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I use SwiftKey on my Android phone all the time. So I was super pumped up when they agreed to partner with us on the first Capstone course for the Johns Hopkins Data Science  Specialization to run in October 2014. To enroll … Continue reading →

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Hijacking R Functions: Changing Default Arguments

August 19, 2014
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Hijacking R Functions: Changing Default Arguments

I am working on a package to collect common regular expressions into a canned collection that users can easily use without having to know regexes. The package, qdapRegex, has a bunch of functions in the form of rm_xxx. The only … Continue reading →

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Stroopy names

August 19, 2014
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Baby Name Wizard is all over this one. And this all makes me wonder: is there a psychology researcher somewhere with a dog named Stroopy? Probably so. P.S. I just made the mistake of googling “Stroopy.” Don’t do it. I was referri...

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googleVis 0.5.5 released

August 19, 2014
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googleVis 0.5.5 released

Earlier this week we released googleVis 0.5.5 on CRAN. The package provides an interface between R and Google Charts, allowing you to create interactive web charts from R. This is mainly a maintenance release, updating documentation and minor issues.Sc...

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