# Monthly Archives: November 2010

## Analysis of retractions in PubMed

November 30, 2010
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As so often happens these days, a brief post at FriendFeed got me thinking about data analysis. Entitled “So how many retractions are there every year, anyway?”, the post links to this article at Retraction Watch. It discusses ways to estimate the number of retractions and in particular, a recent article in the Journal of

## Data visualization videos

November 29, 2010
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Probably everyone has seen Hans Rosling’s famous TED talk by now. I recently came across a couple of other exceptional talks on data visualization: Hans Rosling again: Let my dataset change your mindset. If only all statistics lecturers were this dynamic! David McCandless: The beauty of data visualization. Not so exciting as Hans, but some great

## Initializing the Holt-Winters method

November 29, 2010
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The Holt-Winters method is a popular and effective approach to forecasting seasonal time series. But different implementations will give different forecasts, depending on how the method is initialized and how the smoothing parameters are selected. In this post I will discuss various initialization methods. Suppose the time series is denoted by and the seasonal period

## Sorting out Sweave in Eclipse/StatET

November 29, 2010
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Using Sweave to produce pretty-looking documentation for R is awfully handy. It takes a little tweaking to get set up in Eclipse and StatET though. I followed the information in Jeromy Anglim’s webpage to originally get Sweave set up. The followi...

## Slices and crumbs [arXiv:1011.4722]

November 29, 2010
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$Slices and crumbs [arXiv:1011.4722]$

An interesting note was arXived a few days ago by Madeleine Thompson and Radford Neal. Beside the nice touch of mixing crumbs and slices, the neat idea is to have multiple-try proposals for simulating within a slice and to decrease the dimension of the simulation space at each try. This dimension diminution is achieved via

## The Joy of Visualizations

November 29, 2010
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This is a clip from the forthcoming BBC4 program, The Joy of Stats: The clip shows Hans Rosling (who we've profiled here before), plotting life expectancy versus income for various countries, and animating over time. The clip amply demonstrates that with the right presentation and story, even the simplest of scatterplots can be a joy to behold. I'm looking...

## Altering Eclipse user name

November 29, 2010
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Using StatET’s code generation templates is handy, but the standard Eclipse variable for \${user} just inserts the currently logged-in user’s account name. If you want a different name to appear when \${user} is called, one method is to alter...

## John Chambers on R and Multilingualism

November 29, 2010
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John Chambers, one of the creators of R's predecessor S and a current member of the R Core Group, gave a seminar at Stanford last week titled "R, other languages and object-oriented programming". Unfortunately, I was away for the Thanksgiving break and couldn't make it myself, but John has kindly made his slides (PDF) available for download. The talk...

## Statistique de l’assurance STT6705V, partie 11

November 29, 2010
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Last course will be uploaded soon (the links will be here and there). The R code considered is given below. First, we had to work a little bit on the datasets, tabB=read.table("http://perso.univ-rennes1.fr/arthur.charpentier/tabB.csv", sep=";",head...

## SAS and R joins SAS-x

November 29, 2010
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Tal Galili, organizer of the R-bloggers blog aggregator, has opened a new aggregator for people blogging about SAS. If you're unfamiliar with the concept, an aggregator is a single blog which republishes (with permission, in this case) the entries fro...