## How unusual is it for TLDs to resolve to an address at the top most level? (a.k.a. a sneaky, basic introduction to dplyr)

August 29, 2014
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I saw this on Hacker News this morning and it got me curious as to how many other TLDs (e.g. .com) resolve to an address (i.e. http://uz./ displays a page in your browser since uz. resolves to 91.212.89.8). This is quick work with R and the resolv & iptools packages, plus I threw in a little...

## R tops KDNuggets data analysis software poll for 4th consecutive year

August 29, 2014
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KDNuggests asked its readers the question "What programming/statistics languages you used for an analytics / data mining / data science work in 2014?" and one again, R was the...

## Comparing ATR order sizing to max dollar order sizing

August 29, 2014
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First off, it has come to my attention that some readers have trouble getting some of my demos to work … Continue reading →

## Launching DATA-COPE

August 28, 2014
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Really excited to launch my new website  - DATA-COPE, a place for education data analysts to share ideas, learn about the latest tools and policies affecting their work, and to...

## R vs MATLAB (Round 3)

August 28, 2014
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At least for me, R by faR. MATLAB has its own way of doing things, which to be honest can probably be defended from many angles. Here are few...

## Matt Dowle’s data.table Talk from useR! 2014

August 28, 2014
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Matt Dowle holds a wealth of knowledge and is worth listening to for a variety...

## R User Group Roundup

August 28, 2014
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by Joseph Rickert In the first half of 2014, worldwide R user group activity continued to increase, showing impressive growth over the same periods for the past couple of...

## A Brief Introduction to Plotly

August 28, 2014
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This is a guest post by Matt Sundquist. Matt studied philosophy at Harvard and is a Co-founder at Plotly. He previously worked for Facebook’s Privacy Team, has been a Fulbright...

## Getting emotional in the absence of something: Using the Berlin Affective Word List to analyze emotional valence and arousal for nouns and adjectives.

August 28, 2014
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This is something I did a while ago using the Berlin Affective Word List (BAWL).The BAWL contains ratings for 2902 German words (2107 nouns, 504 verbs, 291...

## The Andrica’s Conjecture

August 27, 2014
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Things should be as simple as possible, but not simpler (Albert Einstein) Following with conjectures about primes, it is time for Andrica’s conjecture. The great mathematician Leonhard Euler (1707-1783) pointed:...

## DataScienceLA interviews David Smith

August 27, 2014
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While I was in LA for the useR! 2014 conference last month, I had the great pleasure of being among the participants in the DataScienceLA interview series hosted by...

## statebins – U.S. State Cartogram Heatmaps in R

August 27, 2014
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UPDATE The statebins package is now available on CRAN I became enamored (OK, obsessed) with a recent visualization by the WaPo team which @ryanpitts tweeted and dubbed statebins:

## R Workshops Updated to Include the Latest Packages

August 27, 2014
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Two new R packages are quickly becoming standards in the R community: Hadley Wickham’s dplyr and tidyr. The dplyr package almost completely replaces his popular plyr package for data...

August 27, 2014
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Original post from Robin's Blog:Software is very important in science – but good software takes time and effort that could be used to do...

August 26, 2014
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What is the Gauss-Markov theorem? From “The Cambridge Dictionary of Statistics” B. S. Everitt, 2nd Edition: A theorem that proves that if the error terms in a multiple regression...

## TTTAR2: My First Shiny App with Bootstrap – #RUGSMAPS

August 26, 2014
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Thing To Try After useR! part 2 (TTTAR2) Originally, this post was supposed to be a sequel to TTTAR1 about h2o machine learning. Since TTTAR1...

## Statistics: Losing Ground to CS, Losing Image Among Students

August 26, 2014
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by Norman Matloff The American Statistical Association (ASA) leadership, and many in Statistics academia. have been undergoing a period of angst the last few years, They worry that the...

## Coursera course on computational finance with R

August 26, 2014
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As of today (Tuesday 26th of August), a new session of Professor Eric Zivot’s course on computational finance and financial econometrics starts on Coursera. Just like the previous run of the...

August 26, 2014
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Original post from GitHub Guides:Digital Object Identifiers (DOI) are the backbone of the academic reference and metrics system. If you’re a researcher writing...

## Statistics: Losing Ground to CS, Losing Image Among Students

August 26, 2014
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The American Statistical Association (ASA)  leadership, and many in Statistics academia. have been undergoing a period of angst the last few years,  They worry that the field of Statistics...

August 26, 2014
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Over the weekend we released version 0.1.8 of the ChainLadder package for claims reserving on CRAN. What is claim reserving?The insurance industry, unlike other industries, does not sell...

## The Chi-Squared Test of Independence – An Example in Both R and SAS

$The Chi-Squared Test of Independence – An Example in Both R and SAS$

Introduction The chi-squared test of independence is one of the most basic and common hypothesis tests in the statistical analysis of categorical data.  Given 2 categorical random variables, and...

## Do Massive Workloads Equal Big Declines in Running Back Productivity?

August 25, 2014
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The popular wisdom is that “massive workloads” result in a decline in running back productivity in the following season. For example, anecdotal evidence using Corey Dillon (2004) and Jamaal...

## Continuous or Discrete Latent Structure? Correspondence Analysis vs. Nonnegative Matrix Factorization

August 25, 2014
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A map gives us the big picture, which is why mapping has become so important in marketing research. What is the perceptual structure underlying the European automotive market? All...

## Spline interpolation of temporal resolution for satellite images.

August 25, 2014
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This week, I had a discussion with a few of...

## David Smith, the useR! 2014 Interview

August 25, 2014
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“At one point, the only source for daily R news was David Smith’s blog.” —...

## Of Needles and Haystacks: Building an Accurate Statewide Dropout Early Warning System in Wisconsin

August 25, 2014
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For the past two years I have been working on the Wisconsin Dropout Early Warning System, a predictive model of on time high school graduation for students in grades...

## 8 new R jobs (for Augest 25th 2014)

August 25, 2014
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This is the bimonthly R Jobs post (for 2014-08-25), based on the R-bloggers’ sister website: R-users.com. If you are an employer who is looking to hire people from the R community, please visit this link...