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 do this from menus and hotkeys, but on OS X it sticks you in Terminal.app. I’m an iTerm user—and, I really prefer being in that app vs the one...

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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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analyze the programme for the international assessment of adult competencies (piaac) with r

August 19, 2014
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heaven knows we've all been there: you're in a heated argument with some patriotic zealot who thinks (insert country here) has the best labor force on earth.  you know...

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Data Cleaning is a critical part of the Data Science process

August 18, 2014
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A New York Times article yesterday discovers the 80-20 rule: that 80% of a typical data science project is sourcing cleaning and preparing the data, while the remaining 20%...

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A Conversation with Tal Galili at useR! 2014

August 18, 2014
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“One can acquire everything in solitude except character.” ― Stendhal The Interview Tal Galili is,...

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Announcing the DSLA Podcast!

August 18, 2014
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You’ve asked and we’ve listened. The audio content from our DataScience.LA interviews will now be...

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What are the Odds of an Independent Scotland?

August 18, 2014
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What are the Odds of an Independent Scotland?

“For things to remain the same, everything must change.” (Gattopardo by Giuseppe Tomasi di Lampedusa) In less than a month, Scots will decide if they want Scotland tied or...

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Example 2014.10: Panel by a continuous variable

August 18, 2014
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Example 2014.10: Panel by a continuous variable

In Example 8.40, side-by-side histograms, we showed how to generate histograms for some continuous variable, for each level of a categorical variable in a data set. An anonymous...

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A Hammer Trading System — Demonstrating Custom Indicator-Based Limit Orders in Quantstrat

August 18, 2014
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A Hammer Trading System — Demonstrating Custom Indicator-Based Limit Orders in Quantstrat

So several weeks ago, I decided to listen on a webinar (and myself will be giving one on using quantstrat … Continue reading →

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Goodbye static graphs, hello shiny, ggvis, rmarkdown (vs JS solutions)

August 18, 2014
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Goodbye static graphs, hello shiny, ggvis, rmarkdown (vs JS solutions)

One of the very exciting and promising developments from RStudio is the rmarkdown/shiny/ggvis combination of tools. We’re on the verge of static graphs and presentations being as old-fashioned as...

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GEFCom 2014 energy forecasting competition is underway

August 17, 2014
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GEFCom 2014 is the most advanced energy forecasting competition ever organized, both in terms of the data involved, and in terms of the way the forecasts will be evaluated....

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Hayward/San Leandro Housing Prices

Hayward/San Leandro Housing Prices

I’ve done a previous post about the salaries of data scientists, but now I’m going to look at one of the negative sides of all the high salaries generated by the...

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Changes to FSA — Estimating Abundance

August 17, 2014
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Changes to FSA — Estimating Abundance

I mentioned previously, that I have been updating the Mark-Recapture vignettes.  That has morphed into a document that is an update of the Mark-Recapture Closed and Open vignettes and...

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21 R navigation tools

August 17, 2014
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21 R navigation tools

Navigation gets you from where you are to where you want to be. Speaking of navigation, you can jump to selected sections of this post: Navigation; R-bloggers; Task views;...

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Quicksort speed, just in time compiling and vectorizing

August 17, 2014
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Quicksort speed, just in time compiling and vectorizing

I was reading the Julia documentation the other day. They do speed comparisons to other languages. Obviously R does not come out very well. The R code for quicksort...

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