Monthly Archives: July 2013

A Julia Meta Tutorial

July 11, 2013
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A Julia Meta Tutorial

If you are thinking about taking Julia, the hot new mathematical, statistical, and data-oriented programming language, for a test drive, you might need a little bit of help. In this blog we round up some great posts discussing various aspects … Continue reading → The post A Julia Meta Tutorial appeared first on Data Community DC.

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TriMatch – useR! 2013 Slides and Version 0.9 Released to CRAN

July 11, 2013
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TriMatch – useR! 2013 Slides and Version 0.9 Released to CRAN

Our presentation on the TriMatch package at the useR! 2013 Conference went fantastically. Thanks for those who attended and the wonderful discussion that followed. The slides can be downloaded from Github as well as the abstract. To coincide with our presentation version 0.9 has been released to CRAN. The package includes a vignette and two demos. install.packages('TriMatch',repos='http://cran.r-project.org') require(TriMatch) vignette('TriMatch') demo(tutoring) demo(nmes)

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Expected Points by Position Rank in Fantasy Football

July 10, 2013
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Expected Points by Position Rank in Fantasy Football

In this post, I calculate the expected fantasy points scored by players based on their position and position rank.  This post is modeled after a post by Chase Stuart (see here), where he calculated players' expected fantasy points as a functi...

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UseR! 2013 – Day 1 notes

July 10, 2013
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UseR! 2013 – Day 1 notes

Hadley Wickham presents at the useR! 2013 conference, July 10 2013 Today marked the first day of the 2103 useR! conference, a gathering of more than 350 R users from around the world. The conference has been quite a success so far, kicking off yesterday with a day of tutorials followed by a tapas-fueled welcome party in the center...

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Analyse discriminante linéaire ou Regression logistique

July 10, 2013
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Analyse discriminante linéaire ou Regression logistique

Supposons que l'on dispose d'iris de Paris (en population >100khabts) et qu'on veuille pouvoir les classer selon leurs caractéristiques sociodémos : Population taux de chômage Etudiants CSP etc... Une fois, les iris classés, on se demande si l'on peut transporter cette typologie à une autre grande ville (Lyon) par exemple : Il faudrait alors pouvoir utiliser un modèle d'affectation des iris selon leurs caractéristiques respectives...

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Visualizing a tiny slice of India’s demographics with information from Wikipedia

July 10, 2013
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Visualizing a tiny slice of India’s demographics with information from Wikipedia

This post presents a tiny slice of a complex and diverse India using charts. (Data retrieval from Wikipedia on 9 July, 2013 and the analysis were performed using R; charts were generated using ggplot2, googleVis and wordcloud. More information can be f...

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rCharts version of d3 horizon

July 10, 2013
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rCharts version of d3 horizon

I love horizon plots.  My love shows up throughout my blog, and I have plotted horizon charts in base graphics, xtsExtra, lattice, and ggplot2.  Now with rCharts, we can implement Jason Davies d3.js horizon chart plugin to plot R data in...

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Parallel Random Number Generation using TRNG

July 10, 2013
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Parallel Random Number Generation using TRNG

To my surprise and disappointment, popular scientific libraries like Boost or GSL provide no native support for parallel random number generation. Recently I came across TRNG, an excellent random number generation library for C++ built specifically with parallel architectures in mind. Over the last few days I’ve been trawling internet forums and reading discussions about The post Parallel...

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Please send all comments to /dev/ripley

July 10, 2013
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Please send all comments to /dev/ripley

Trey Causey asks, Has R-help gotten meaner over time?: I began by using Scrapy to download all the e-mails sent to R-help between April 1997 (the earliest available archive) and December 2012. . . . We each read 500 messages and coded them in the following categories: -2 Negative and unhelpful -1 Negative but helpful The post Please...

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Types in lambda.r versus classes in S4

July 10, 2013
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Types in lambda.r versus classes in S4

Here’s a quick example of the power of lambda.r and how it simplifies the programming model. On the r-devel mailing …Continue reading »

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