February 2015

The United States In Two Words

February 20, 2015 | 0 Comments

Sweet home Alabama, Where the skies are so blue; Sweet home Alabama, Lord, I’m coming home to you (Sweet home Alabama, Lynyrd Skynyrd) This is the second post I write to show the abilities of twitteR package and also the second post I write for KDnuggets. In this case ...
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Part 2: Data Preparation

February 20, 2015 | 0 Comments

In Part 1 I have introduced the weather data set we will be using in this series of tutorials. We are now going to have the data prepared for the subsequent EDA. We will recode and transform variables, change their types, and perform some basic data ch... [Read more...]

CRAN: the Granddaddy of Analytical Marketplaces

February 20, 2015 | 0 Comments

by Bill Jacobs, VP Product Marketing, Revolution Analytics I had a most interesting exchange with an industry analysis firm recently who suggested that application marketplaces were critical to the success of analytical tools, suggesting that Revolution Analytics was remiss in not creating one. I must say, I was taken aback ... [Read more...]

Who Has the Best Fantasy Football Projections? 2015 Update

February 20, 2015 | 0 Comments

In prior posts, I demonstrated how to download projections from numerous sources, calculate custom projections for your league, and compare the accuracy of different sources of projections (2013, 2014).  In[...] The post Who Has the Best Fantasy Football Projections? 2015 Update appeared first on Fantasy Football Analytics. [Read more...]

Jade: a clean, whitespace-sensitive template language for writing HTML

February 19, 2015 | 0 Comments

Jade is a high performance template engine heavily influenced by Haml. It is designed for writing HTML pages using a concise, modern syntax without the verbosity of old fasioned XML-like tags that we all want to forget about. The new rjade package implements convenient bindings from R to this popular ...
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Applied Nonparametric Econometrics

February 19, 2015 | 0 Comments

Recently, I received a copy of a new econometrics book, Applied Nonparametric Econometrics, by Daniel Henderson and Christopher Parmeter.The title is pretty self-explanatory and, as you'd expect with any book published by CUP, this is a high-quality item.The book's Introduction begins as follows:"The goal of this book ... [Read more...]

Customer segmentation – LifeCycle Grids, CLV and CAC with R

February 19, 2015 | 0 Comments

We studied a very powerful approach for customer segmentation in the previous post, which is based on the customer’s lifecycle. We used two metrics: frequency and recency. It is also possible and very helpful to add monetary value to our segmentation. If you have customer acquisition cost (CAC) and ...
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Some R Conferences in 2015

February 19, 2015 | 0 Comments

by Joseph Rickert For the past few years, the Strata + Hadoop World Conference in San Jose has kicked off my personal conference season. With its focus on Data Science, Strata always seems to present some interesting R related talks, and I am looking forward to the various events over the ... [Read more...]

Webscraping Art Auction Data

February 19, 2015 | 0 Comments

Check out my: Portfolio Site Github LinkedIn Introduction Goal Scrape all of the data off of the Blouin Art Sales Index: http://artsalesindex.artinfo.com Method Step 1 — […]
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Host a CRAN mirror using Docker

February 19, 2015 | 0 Comments

CRAN mirrors are the backbone to everyday common R usage. They provide the R website and most of the R packages today. Currently there are about 104 official CRAN mirrors. Hosting a CRAN mirror is one step to help the R community and is explained here. To ease that process, at ... [Read more...]

The Evolution of LondonR

February 19, 2015 | 0 Comments

By Liz Matthews – Marketing and Events, UK. There are over 150 R user groups currently running across the globe. From Chiang Mai to Kansas and Melbourne to Cracow, R enthusiasts meet to discuss, share and promote the usage of R. … Continue reading → [Read more...]

amazing Gibbs sampler

February 18, 2015 | 0 Comments

When playing with Peter Rossi’s bayesm R package during a visit of Jean-Michel Marin to Paris, last week, we came up with the above Gibbs outcome. The setting is a Gaussian mixture model with three components in dimension 5 and the prior distributions are standard conjugate. In this case, with 500 ...
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Rborist Package 0-1.0 Now Hosted on CRAN

February 18, 2015 | 0 Comments

Rborist, the R package version of the Arborist decision-tree utility, is now available from CRAN. Version 0-1.0 is the initial release. The Arborist implements the Random Forest algorithm with an emphasis on performance and extensibility. Particula... [Read more...]

An update to the checkpoint package

February 18, 2015 | 0 Comments

by Andrie de Vries During October 2014 we announced RRT (the Reproducible R Toolkit) that consists of the checkpoint package and the MRAN. In January, David Smith followed up with another post about reproducibility using Revolution R Open. Since then, we've had several requests for new features and enhancements. The development ... [Read more...]

Making R Files Executable (under Windows)

February 18, 2015 | 0 Comments

Although it is reasonable that R scripts get opened in edit mode by default, it would be even nicer (once in a while) to run them with a simple double-click. Well, here we go ... Choosing a new file extension name (.Rexec) First, we have to think about a new file ... [Read more...]

Waterfall plots in R

February 18, 2015 | 0 Comments

Follow Email Last week I posted about an orphaned paper of mine, a piece of research that hasn’t yet found a home and which I’m unlikely to find further time to work on. Abandoning something that you’ve worked hard on is disappointing and so it made sense ... [Read more...]
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