Exploring the functions in a package

January 26, 2012
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Exploring the functions in a package

Sometimes it can be useful to list all the functions inside a package. This is done in the same way that you would list variables in your workspace. That is, using ls. The syntax is ls(pos = "package:packagename"), which is easy enough if you can remember it. Unfortunately, I never can, and have to type

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How to create the best Interactive R Language Online Learning Platform from the views of R community?

January 26, 2012
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How to create the best Interactive R Language Online Learning Platform from the views of R community?: R offers a breadth and depth in statistical computing beyond what is available in commercial closed source products. Yet R remains, primarily, a ...

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Hottest 100 for 2011

January 26, 2012
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Hottest 100 for 2011

Another year, another Australia Day. Another Australia Day, another Triple J Hottest 100. And that, of course, means an excellent excuse to  set R to work on the chart data. For those outside Australia, the Hottest 100 is a chart of the most popular songs of the previous year, as voted by the listeners of

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osmar – Don’t Miss this New R-Geo-Package!

January 26, 2012
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osmar – Don’t Miss this New R-Geo-Package!

The osmar-package enables you to retrieve all geographic elements of OpenStreetMap via its API.I.e., you can retrieve a street, river, state-boundary or whatever and use this as a spatial object in R.It's overwhelming thinking of the endless playg...

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Paper on org-mode and reproducible research

January 26, 2012
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Paper on org-mode and reproducible research

As I was talking recently about reproducible research, I have to post this. A new paper by Eric Schulte, Dan Davison, Thomas Dye, Carsten Dominik. If you haven’t heard about them, you haven’t been on the org-mode mailing list. They could be called the main contributors to org-mode and the part of org-mode called babel,

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Announcing the winners of the Applications of R in Business contest

January 25, 2012
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It's with great pleasure that the team at Revolution Analytics announces the winners of the inaugural "Applications of R in Business" contest: Grand Prize ($10,000): Shannon Terry and Ben Ogorek, Nationwide Insurance for 'A Direct Marketing In-flight Forecasting System' Runner Up Prize ($5,000): Jeffrey Breen, Atmosphere Research Group for 'Mining Twitter for Airline Consumer Sentiment' Congratulations to both winners,...

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Random matrix theory and APT’s daily global model

January 25, 2012
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Random matrix theory and APT’s daily global model

Someone emailed me recently and asked about how APT uses random matrix theory in their factor model. Another question I …Continue reading »

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ABC [PhD] course

January 25, 2012
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ABC [PhD] course

As mentioned in the latest post on ABC, I am giving a short doctoral course on ABC methods and convergence at CREST next week. I have now made a preliminary collection of my slides (plus a few from Jean-Michel Marin’s), available on slideshare (as ABC in Roma, because I am also giving the course in

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ESPN Prediction Performance for the NFL

January 25, 2012
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ESPN Prediction Performance for the NFL

Description:ESPN 'experts' predict the National Football League wins/losses each week.  The above chart shows the percentage of their correct guesses and an overall trend, week by week.Data:http://espn.go.com/nfl/picksAnalysis:The graph shows an i...

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RStudio v0.95 Released

January 25, 2012
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RStudio v0.95 Released

The final version of RStudio v0.95 is now available for download from our website (thanks to everyone who put the preview release through its paces over the last couple of weeks!). Highlights of the new release include: Projects — A new system for managing R projects that enables easy switching between working directories and per-project contexts

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RStudio does not start when using a R version built from source

January 25, 2012
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Because I do not have root privileges on some of the machines I use, I build part of my software from source and install it into my own homedirectory. Doing that requires one to download R from CRAN, e.g. R… See more ›

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A wordcloud comparison of the 2011 and 2012 #SOTU

January 24, 2012
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A wordcloud comparison of the 2011 and 2012 #SOTU

I wrote a quick (and very dirty) R script for creating a comparison cloud and a commonality cloud for President Obama’s 2011 and 2012 State of the Union speeches*. The cloud on the left shows words that have different frequencies between the two spe...

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Project Euler in R: Problem 25

January 24, 2012
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Solutions in R to Project Euler problems are generally hard to find, so I've recently started posting R solutions on this site.  Here are the previous problems: problem 22, problem 23 and problem 24Now let's...

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R Appears Among Top 20 Programming Languages

January 24, 2012
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R Appears Among Top 20 Programming Languages

Speaking of R… On the 16th, TIOBE Software released the Tiobe Index of the most popular programming languages. For the first time ever, R is in the Top 20. The top spots are, no surprise, occupied by Java and C respectively. More after the jump. The way this index is assembled is…interesting. The full way

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Geocode your data using, R, JSON and Google Maps’ Geocoding APIs

January 24, 2012
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Over the last year and half, I have faced numerous challenges with geocoding the data that I have used to showcase my passion for location analytics.  In 2012, I decided to take thing in my control and turned to R.  Here, I am sharing a simpl...

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BBBT Podcast with David Smith

January 24, 2012
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Last Friday I was fortunate enough to have the opportunity to travel to Boulder, CO and present R and Revolution Analytics to about 20 analysts as part of the Boulder BI Brain Trust (BBBT). It was a great pleasure to describe the vision for Revolution R Enterprise and got some great feedback from the particpants. During the event, I...

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It is "simply" the average value

January 24, 2012
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It is "simply" the average value

for some obscure reasons, simple things are usually supposed to be simple. Recently, on the internet, I saw a lot of posts on the "average time in which you hold a stock", and two rather different values are mentioned "Take any stock in the United ...

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CBC Reviews: Revolution R (in which this doesn’t go well)

January 24, 2012
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CBC Reviews: Revolution R (in which this doesn’t go well)

Update!: The latest version of Revolution R, which added support for RHEL 6, appears to work (it appears to at least install, run, and perform basic tasks). See this post for more details. I’ve come to enjoy using R. I had dabbled with it in the past, but found it painfully opaque, and the Effort:Reward

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Announcing boolean3 (beta)

January 24, 2012
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After entirely too long, I am happy to announce the beta release of boolean3, an R package for modeling causal complexity. The package can be downloaded at the following links: Unix/Linux: boolean3_3.0.20.tar.gz Windows: boolean3_3.0.20.zip (Please let me know if you have any … Continue reading →

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Interactive Graphics with the iplots Package (from “R in Action”)

January 24, 2012
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Interactive Graphics with the iplots Package (from “R in Action”)

(This article was first published on R-statistics blog » R, and kindly contributed to R-bloggers) The followings introductory post is intended for new users of R.  It deals with interactive visualization using R through the iplots package. This is a guest article by Dr. Robert I. Kabacoff, the founder of (one of) the first online R tutorials websites: Quick-R. Kabacoff has...

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Analyzing US Government Contract Awards in R

January 23, 2012
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Analyzing US Government Contract Awards in R

As I was exploring open data sources, I came across USA spending. This site contains information on US government contract awards and other disbursements, such as grants and loans. In this post, we will look at data on contracts awarded in the state of Maryland in the fiscal year 2011, which is available by selecting "Maryland"...

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ACT to SAT M+V Concordance Chart in R

January 23, 2012
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For those of who work in Enrollment Management and routinely analyze higher ed data, I wanted to share an easy way to convert ACT to equivalent SAT M+V scores in R. I am dynamically building a dataset that uses the concordance chart located here. Simply, use this data frame and merge it onto your existing

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New R User Group in Belgium

January 23, 2012
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RBelgium is the latest local R user group to join the R community. Led by R user Jean-Baptiste Poullet, the group will host meetings on the first Friday of each month at the Alfot Hotel in Brussels, as well as weekly coffee get-togethers. The group also provides an on-line discussion forum on statistics and applications with R. You can...

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Flight mapping in R

January 23, 2012
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Flight mapping in R

This map has been produced before (and much better) by others but who cares. This effort was achieved purely via the standard R plot function*. I believe the only departure from predecessor maps has been to order the list by … Continue reading →

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My first R package: parallel differential evolution

January 23, 2012
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My first R package: parallel differential evolution

Last night I was working on a difficult optimization problems, using the wonderful DEoptim package for R. Unfortunately, the optimization was taking a long time, so I thought I'd speed it up using a foreach loop, which resulted in the fo...

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Marketing Mix Lab: Visualising The Correlation Matrix

January 23, 2012
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Marketing Mix Lab: Visualising The Correlation Matrix

Following on from the previous post here is an R function for visualising correlations between the explanatory variables in your data set. An interesting example is the North Carolina Crime data set that comes with the plm package. This has the following continuous variables: crmrte crimes committed per person prbarr probability of arrest prbarr probability … Continue reading...

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The distribution of financial returns made simple

January 23, 2012
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The distribution of financial returns made simple

Why returns have a stable distribution As “A tale of two returns” points out, the log return of a long period of time is the sum of the log returns of the shorter periods within the long period. The log return over a year is the sum of the daily log returns in the year.  … Continue reading...

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RNetLogo – A package for running NetLogo from R

January 23, 2012
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Described in a new Methods in Ecology and Evolution paper here, a new R package RNetLogo allows you to use NetLogo from R. NetLogo is software is a "multi-agent programmable modeling environment". NetLogo can be used in individual- and agent-based mod...

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Starburst in R

January 22, 2012
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> starburst('Matrices!') M M M a a a t t t rrr Matrices! ccc e e e s s s ! ! ! wrathematic led me FibBuzz, which led me to 

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