RProtoBuf 0.4.2

December 11, 2014
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A new release 0.4.2 of RProtoBuf is now on CRAN. RProtoBuf provides R bindings for the Google Protocol Buffers ("Protobuf") data encoding library used and released by Google, and deployed as a language and operating-system agnostic protocol by numerous projects. Murray and Jeroen did almost all of the heavy lifting. Many changes were...

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Can pregnant women intuit the sex of their children?

December 11, 2014
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Can pregnant women intuit the sex of their children?

“So let’s start with the fact that the study had only 100 people, which isn’t nearly enough to be able to make any determinations like this. That’s very small power. Secondly, it was already split into two groups, and the two groups by the way have absolutely zero scientific basis. There is no theory that

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Accessing, cleaning and plotting NOAA Temperature Data

December 11, 2014
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Accessing, cleaning and plotting NOAA Temperature Data

In my previous post I said that my students are using data from NOAA for their research.NOAA in fact provides daily averages of several environmental parameters for thousands of weather stations scattered across the globe, completely free. In details, NOAA provides the following data: Mean temperature for the day in degrees Fahrenheit to tenths Mean dew point for the...

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Revolution R Open 8.0.1 now available

December 11, 2014
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Revolution R Open 8.0.1 now available

We've just made the latest update to Revolution R Open, the enhanced distribution of open-source R, available for download from MRAN. The main feature of this release is an upgrade to the R 3.1.2 engine, and support for MacOS Yosemite. (You can read about all the changes in the NEWS file.) To support reproducibility, Revolution R Open works with...

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Out of Nowhere–Explore Text on a Path

December 11, 2014
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I had not really stopped to think of this until I listened to this The Web Ahead podcast with Sara Soueidan.  What is really interesting about the tech world is how experts can seemingly pop up out of nowhere and become the authority on a topic.  In the podcast, this was the case with the interviewee Sara Soueidan.  We...

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In case you missed it: November 2014 Roundup

December 11, 2014
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In case you missed them, here are some articles from November of particular interest to R users. Reviews of some of the R-related presentations (by John Chambers, Trevor Hastie and others) at the H20 World conference. An R/Shiny app for making egg-nog. An author's look at how R was used to create many of the beautiful graphics in the...

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Analyzing Ponemon Cost of Data Breach

December 11, 2014
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Analyzing Ponemon Cost of Data Breach

I was recently presenting on the use of statistics for risk analysis at the SIRACon conference held in Minneapolos (Oct. 9th and 10th, 2014). I was explaining how models and algorithms work at a high level: given one or more observations and the outcomes, we build models or algorithms to learn how the observations can help predict the outcome. As examples I used things...

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The New Edition of the Portfolio Optimization with R/Rmetrics is coming soon!

December 11, 2014
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(This article was first published on Rmetrics blogs, and kindly contributed to R-bloggers) To leave a comment for the author, please follow the link and comment on his blog: Rmetrics blogs. R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web...

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digest 0.6.6 (and 0.6.5)

December 10, 2014
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A new release 0.6.6 of the digest package is now on CRAN and in Debian. This release brings the xxHash non-cryptographic hash function by Yann Collet, thanks to several pull requests by Jim Hester. After the upload of version 0.6.5 we uncovered anoth...

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RcppRedis 0.1.3

December 10, 2014
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A very minor bugfix release of RcppRedis is now on CRAN. The zcount function now returns the correct type. Changes in version 0.1.3 (2014-12-10) Bug fix setting correct return type of zcount Courtesy of CRANberries, there i...

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Use hidden advanced arguments for user-friendly functions

December 10, 2014
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Use hidden advanced arguments for user-friendly functions

As a user Imagine that you are starting to learn how to use a specific R package, lets call it foo. You will look at the vignette (if there is one), use help(package = foo), or look at the reference manual (for example, devtools' ref man). Eventually, you will open the help page for the function(s) you are interested...

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Wide Receiver Gold Mining – Week 15

December 10, 2014
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The graph below summarizes the projections from a variety of sources. This week’s summary includes projections from: CBS’s Dave Richard, Fantasy Football Sharks, CBS’s Jamey Eisenberg, ESPN, Fantasy Football Today, The post Wide Receiver Gold Mining – Week 15 appeared first on Fantasy Football Analytics.

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An Update to the Robustness Heuristic and a Variation of a Volatility Strategy

December 10, 2014
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An Update to the Robustness Heuristic and a Variation of a Volatility Strategy

So, before revealing a slight wrinkle on the last strategy I wrote about, I’d like to clear up a bit … Continue reading →

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O’Reilly Data Scientist Salary and Tools Survey, November 2014

December 10, 2014
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O’Reilly Data Scientist Salary and Tools Survey, November 2014

The O'Reilly Data Scientist Survey for 2014 is out, with fresh data on the salaries and tools used by data scientists. Jon King has a summary of the results, but not much has changed since last year: median income is down very slightly ($100k in 2013 vs $98k in 2014), and the most popular analysis tools (excluding operating systems)...

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A “did you mean?” Feature for R

December 10, 2014
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Most search engines have a "did you mean?" feature, where suggestions are given in the presence of likely typos. And while search engines use sophisticated NLP methods on their vast amounts of user-generated data to create accurate suggestions, you can get by with some ancient spellchecker techniques. So a little while ago, I did just that with the Rdym...

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Set up R/Stan on Amazon EC2

December 10, 2014
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A few months ago I posted the script that I use to set up my R/JAGS working environment on an Amazon EC2 instance.Since then I've largely transitioned to using R/Stan to estimate my models. So, I've updated my setup script (see below). There are a few...

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Spatial visualization with R – Tutorial

December 10, 2014
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Spatial visualization with R – Tutorial

The visualization of spatial data is one of the most popular applications when using R. This tutorial is an introduction to the visualization of spatial data and map making in R. The following issues will be addressed: Import anduse of shapefiles in R (shapefile is a file format designed for spatial data). Data management and

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World Point Grid

December 10, 2014
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These days I am following a couple of master projects dealing with renewable energy potentials at the global scale. We wanted to try and compute these potential using only free data and see how far we could go.For wind speed there are plenty of resourc...

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LDA on Ferguson Grand Jury I

December 9, 2014
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LDA on Ferguson Grand Jury I

Tweet The case of Michael Brown, an unarmed black teenager, who was shot and killed on August 9th, by Darren Wilson, a white police officer, in Ferguson has driven public opinion around the globe to the suburb of St. Louis. After few weeks, on Nov. 24, the St. Louis County prosecutor announced that a grand … Read More...

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Tim Bowles on multivariate stats with vegan

December 9, 2014
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Today, Tim Bowles gave this presentation on the vegan package to the Davis R Users’ Group. The screencast and slides are below. You can also download Tim’s RStudio project with all the code, data, figures, and slides presented here. Thanks to Tim for a great session!

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Predictive modelling fun with the caret package

December 9, 2014
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Predictive modelling fun with the caret package

I’m back!  6 months after my second child was born, I’ve finally made it back to my blog with something fun to write about.  I recently read through the excellent Machine Learning with R ebook and was impressed by the caret … Continue reading →

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Updated: Why R is Hard to Learn

December 9, 2014
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Updated: Why R is Hard to Learn

I’ve updated one of my most widely read blog posts, Why R is Hard to Learn. It focuses on the aspects of R which tend to trip up beginners. The new version is over twice as long as the original … Continue reading →

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RcppAnnoy 0.0.4

December 9, 2014
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A few weeks ago, RcppAnnoy had its initial release 0.0.2 and subsequent update in release 0.0.3. The latter brought Windows support, thanks to a neat pull request by Qiang Kou. RcppAnnoy wraps the small, fast, and lightweight C++ template header libr...

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4th Japan.R meeting on December, 6

December 9, 2014
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4th Japan.R meeting on December, 6

We had an exciting meeting "Japan.R" with many talks on last Saturday.(I should have made an advance notice.) (This is the picture of our venue. Thanks FreakOut!!!)We are so pleased that many participants(over 200!!!) enjoyed the talks and have a great relationship each other in pizza party. The following link is the...

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Recordings of RStudio Webinar Series on Essential Tools for Data Science with R

December 9, 2014
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Recordings of RStudio Webinar Series on Essential Tools for Data Science with R

by Yanchang Zhao, RDataMining.com RStudio recently ran a series of live webinars on Essential Tools for Data Science with R, but it is inconvenient for people from other time zones to attend. Fortunately, the recordings have been made available online, … Continue reading →

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Quandl Chapter 2: The Democratization of Commercial Data

December 9, 2014
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by Tammer Kamel Quandl's Founder About 22 months ago I had the privilege of introducing Quandl to the world on this blog. At that time Quandl had about 2 million datasets and a few hundred users. (And we thought that was fabulous.) Now, at the end of 2014, we have some 12 million datasets on the site and tens...

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Image Data Transfer to R with ImageJ and Bio7 2.0

December 9, 2014
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09.12.2014 In the new version of Bio7 2.0 i added some new easy to use functions to transfer image data from ImageJ to R. For example, you can now drag a folder of images on the ImageJ-Canvas view, open them memory efficient as a virtual stack in ImageJ and transfer them with one action as

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New Book: Bayesian Stability Concepts for Investment Managers

December 9, 2014
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(This article was first published on Rmetrics blogs, and kindly contributed to R-bloggers) To leave a comment for the author, please follow the link and comment on his blog: Rmetrics blogs. R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web...

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Identifying Position Change Groupings in Rank Ordered Lists

December 9, 2014
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Identifying Position Change Groupings in Rank Ordered Lists

The title says it all, doesn’t it?! Take the following example – it happens to show race positions by driver for each lap of a particular F1 grand prix, but it could be the evolution over time of any rank-based population. The question I had in mind was – how can I identify positions that

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