More ESA 2014 Program Text-Mining: Topics as Communities

August 22, 2014
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More ESA 2014 Program Text-Mining: Topics as Communities

In my first pass at text analysis of the ESA program, I looked at how the frequency of words used in the ESA program differed from last year to this year. There are much more sophisticated ways at looking at word use in text, though, and I began to dive into the text-mining literature to find...

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Entering the field as a data scientist with certification

August 22, 2014
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By Neera Talbert, VP Services and Ben Wiley, R Programmer at Revolution Analytics By now, everyone should be familiar with the data scientist boom. Simply logging onto LinkedIn reveals...

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Pro Grammar and Devel Hoper

August 22, 2014
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Pro Grammar and Devel Hoper

I've been teasing about this post for some time now. My next blog post is "Pro Grammar and Devel Hoper". And this not just an empty pun. Stay...

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stringdist 0.8: now with soundex

August 22, 2014
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An update to the stringdist package was released earlier this month. Thanks to a contribution of Jan van der Laan the package now includes a method to compute soundex...

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RcppEigen 0.3.2.2.0

August 21, 2014
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A new upstream release of the Eigen C++ template library for linear algebra was released a few days ago. And Yixuan Qiu did some really nice work rolling this into a...

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R in Production – Panel Discussion – LA R meetup @ useR! 2014

August 21, 2014
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(Please click here if the video above doesn’t load.) The video above is from an event...

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R in Production – Opening Talk by Yasmin Lucero – LA R meetup @ useR! 2014

August 21, 2014
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(Please click here if the video above doesn’t load.) During useR! 2014, the LA R...

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Revolution Analytics’ User Group Map Contest has a Winner

August 21, 2014
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by Joseph Rickert We are pleased to announce that Jo-fai Chow is the winner of the Revolution Analytics contest. Jo-fai’s entry, which was implemented as a Shiny project, may...

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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...

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Announcing dtupdate v1.0 – R Package Reporter/Updater for the devtools Universe

August 21, 2014
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The dtupdate package has functions that attempt to figure out which packages have non-CRAN versions (currently only looks for github ones) and then tries to figure out which...

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Optimizing with R expressions

August 21, 2014
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Optimizing with R expressions

I recently discovered a powerful use for R expression()’sSay you are trying to fit some experimental data to the following nonlinear equation: Ky0eu(x−tl)K+y0(eu∗(x−tl)−1)+b1+(b0−b1)e−kx+b2x with the independent variable x using nlminb()...

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For Loop Tracking (Windows Progress Bar)

For Loop Tracking (Windows Progress Bar)

I know that many people consider for-loops the devil, but every so often I get lazy and I use them in the office.  Sometimes it’s nice to keep track of...

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googleVis!!!

August 20, 2014
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googleVis!!!

I'm back working on R&graphics at last. I've made some progress on the shiny+rgl front, but haven't really had the time to create anything which could be posted here......

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Open iTerm (OS X) to a Directory from R

August 20, 2014
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Sometimes you need to get to a command prompt from R, whether it’s to wrangle git on the command line or do some package work. RStudio provides ways to...

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How to integrate R with your calendar

August 20, 2014
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How to integrate R with your calendar

Hilary Parker has contributed a lovely article to Significance, the magazine of the American Statistical Association and the Royal Statistical Society, on using R to set your Google calendar...

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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,”

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R Passes SPSS in Scholarly Use, Stata Growing Rapidly

August 19, 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...

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dplyr: A gamechanger for data manipulation in R

August 19, 2014
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I demonstrate how to use dplyr for data manipulation in R (R code and data on GitHub ). I had heard of the package before and finally gave it...

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GBMs are awesome: Part I

August 19, 2014
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GBMs have become my favorite type of model over the last two years. In this tutorial, I demonstrate how to use a GBM for binary classification in R (predicting...

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RcppArmadillo 0.4.400.0

August 19, 2014
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After two pre-releases in the last few days, Conrad finalised a new Armadillo version 4.400 today. I had kept up with the pre-releases, tested twice against all eighty (!!) CRAN dependents...

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I like you and you like me…but what does it all mean. (Part 1)

August 19, 2014
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I like you and you like me…but what does it all mean. (Part 1)

Tinder is a popular matchmaking application that allows users to connect with others whom they share a physical attraction. New members build their profile by importing their age, gender, geographic information,...

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Recent Articles

August 19, 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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CRAN release jsonlite 0.9.10 (RC)

August 19, 2014
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CRAN release jsonlite 0.9.10 (RC)

The jsonlite package is a JSON parser/generator optimized for the web. It implements a bidirectional mapping between JSON data and the most important...

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Integrating R with production systems using an HTTP API

August 19, 2014
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Integrating R with production systems using an HTTP API

by Nick Elprin, Co-Founder of Domino Data Lab We built a platform that lets analysts deploy R code to an HTTP server with one click, and we describe it...

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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...

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Visualize pre-post comparison of intervention #rstats

August 19, 2014
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Visualize pre-post comparison of intervention #rstats

My sjPlot-package was just updated on CRAN, introducing a new function called sjp.emm.int to plot estimated marginal means (least-squares means) of linear models with interaction terms. Or: plotting adjusted...

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Introducing Rfiglet: ASCII logos from the comfort of R

August 19, 2014
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The Rfiglet Package For those who don't know what figlet is, it's a command line utility for creating ascii logos.  Rfiglet, therefore, is a set of R bindings for...

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Transform point shapefile to SpatStat object

August 19, 2014
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Today I wanted to do some point pattern analysis in R using the fantastic package spatstat.The problem was that I only had a point shapefile, so I googled a...

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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...

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