649 search results for "register"

Blue period: Analyzing the color of paintings with R

April 24, 2015
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Blue period: Analyzing the color of paintings with R

While movies have been getting more orange with time, painting have been going the other direction. Paintings today are generally more blue than they were a few hundred years ago. The image above shows the color spectrum of almost 100,000 paintings created since 1800. Martin Bellander used R to create the image, by scraping images from the BBC YourPaintings...

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Course Profiles in ggplot2

April 23, 2015
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Course Profiles in ggplot2

Over on my other blog, Droppin’ The Hammer… where I journal my ultra running experience, I featured a novel ggplot2 plot for highlight elevation gain and loss on running race course profiles. If you’ve never run a particular race you...

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Parallel Simulation of Heckman Selection Model

April 22, 2015
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Parallel Simulation of Heckman Selection Model

Parallel Simulation of Heckman Selection Model One of the, if not the, fundamental problems in observational data analysis is the estimation of the value of the unobserved choice. If the (i^{text{th}}) unit chooses the value of (t) on the basis of some factors (mathbf{x_i}), which may include...

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AusDM 2015 submission deadline extended to Thursday 30 April

April 20, 2015
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AusDM 2015 submission deadline extended to Thursday 30 April

The 13th Australasian Data Mining Conference (AusDM 2015) Sydney, Australia, 8–9 August 2015 (co-located with SIGKDD’15) URL: http://ausdm15.ausdm.org/ The Australasian Data Mining Conference has established itself as the premier Australasian meeting for both practitioners and researchers in data mining. It … Continue reading →

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R 3.2.0 is released (+ using the installr package to upgrade in Windows OS)

April 17, 2015
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R 3.2.0 is released (+ using the installr package to upgrade in Windows OS)

R 3.2.0 (codename “Full of Ingredients”) was released yesterday. You can get the latest binaries version from here. (or the .tar.gz source code from here). The full list of new features and bug fixes is provided below. Upgrading to R 3.2.0 on Windows If you are using Windows you can easily upgrade to the latest version of R using the installr … Continue reading...

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The Problem with Propensity Scores

April 14, 2015
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The Problem with Propensity Scores

Are Propensity Scores Useful? Effect estimation for treatments using observation data isn't always straight forward. For example, it is very common that patients who are treated with a certain medication or procedure are healthier than those who are not treated. Those who aren't treated may not be...

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Recreating the vaccination heatmaps in R

April 9, 2015
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Recreating the vaccination heatmaps in R

In February the WSJ graphics team put together a series of interactive visualisations on the impact of vaccination that blew up on twitter and facebook, and were roundly lauded as great-looking and effective dataviz. Some of these had enough data available to look … Continue reading →

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Coarse Grain Parallelism with foreach and rxExec

April 2, 2015
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by Joseph Rickert I have written a several posts about the Parallel External Memory Algorithms (PEMAs) in Revolution Analytics’ RevoScaleR package, most recently about rxBTrees(), but I haven’t said much about rxExec(). rxExec() is not itself a PEMA, but it can be used to write parallel algorithms. Pre-built PEMAs such as rxBTrees(), rxLinMod(), etc are inherently parallel algorithms designed...

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Registration Open for R/Finance 2015!

March 31, 2015
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You can find registration information and agenda details (as they become available) on the conference website.  Or you can go directly to the registration page.  Note that there's an early-bird registration deadl...

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R / Finance 2015 Open for Registration

March 31, 2015
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The annoucement below just went to the R-SIG-Finance list. More information is as usual at the R / Finance page. Registration for R/Finance 2015 is now open! The conference will take place on May 29 and 30, at UIC in Chicago. Building on the success of the previous conferences in 2009-2014, we expect more than 250 attendees from around...

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