Monthly Archives: November 2014

Interview with SERATRON – Lego EV3 robot driven by R

November 30, 2014
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Interview with SERATRON – Lego EV3 robot driven by R

Next meeting of Warsaw R Enthusiasts (SER = Spotkania Entuzjastów R) will take place on December 8. We are going to start with Roger Bivand talk about spatial statitics (R Foundation / NHH, author of many R packages). The second talk, by Bartosz Meglicki (IPI PAN), will introduce the SERATRON – fusion of R and

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Turn R (Shiny) Scripts Into Double-clickable OS X Applications With One Line of Code

November 30, 2014
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Turn R (Shiny) Scripts Into Double-clickable OS X Applications With One Line of Code

I was playing with some non-security-oriented R+Shiny code the other day, and thought that Shiny apps would be even more useful if they were double-clickable applications that you could “just run”—provided R was installed on the target system—vs have to cut/paste code into R. Now, I know it’s not hard to enter: shiny::runGist('95ec24c1b0cb433a76a5', launch.browser=TRUE) at an R console, but I’ll wager...

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Book Review: R Object-oriented Programming

November 30, 2014
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Book Review: R Object-oriented Programming

Recently, Packt Publishing publish the book R Object-oriented Programming. The eleven chapter book covers from basic data types in R to a more advanced method such as simulation and writing functions.  Different data types (i.e. integer, character...

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FOMC Dates – Scraping Data From Web Pages

November 30, 2014
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Before we can do some quant analysis, we need to get some relevant data - and the web is a good place to start. Sometimes the data can be downloaded in a standard format like .csv files or available via an API e.g. http://www.quandl.com but often you’ll need to scrape data directly from web pages.In this post I’ll...

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Change in temperature in Netherlands over the last century

November 30, 2014
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Change in temperature in Netherlands over the last century

I read a post 'race for the warmest year' at sargasso.nl. They used a plot, originating from Ed Hawkins to see how 2014 progressed to be warmest year. Obviously I wanted to make the same plot using R. In addition, I wondered which parts of the year had...

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Storing Forecasts in a Database

November 29, 2014
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In my last post I mentioned that I started using RSQLite to store computed results. No rocket science here, but my feeling is that this might be useful to others, hence, this post. This can be done using any database, but I will use (R)SQLite as an illustration. Let’s assume we are running a long

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RcppArmadillo 0.4.550.1.0

November 29, 2014
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A week ago, Conrad provided another minor release 4.550.0 of Armadillo which has since received one minor correction in 4.550.1.0. As before, I had created a GitHub-only pre-release of his pre-release which was tested against the almost one hundred CRAN dependents of our RcppArmadillo package. This passed fine as usual, and results are as always...

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CRAN Task Views for Finance and HPC now (also) on GitHub

November 28, 2014
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The CRAN Task View system is a fine project which Achim Zeileis initiated almost a decade ago. It is described in a short R Journal article in Volume 5, Number 1. I have been editor / maintainer of the Finance task view essentially since the very beginning of these CRAN Task Views, and...

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Interpreting Confidence Intervals – new d3.js visualization

November 28, 2014
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Interpreting Confidence Intervals – new d3.js visualization

I just published a new interactive visualization in my series of basic statistical concepts and techniques. This time I have tried to explain confidence intervals for means. This visualization shows a simulation of repeated sampling from a normal dist...

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Some R Highlights from H20 World

November 28, 2014
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Some R Highlights from H20 World

by Joseph Rickert H2O.ai held its first H2O World conference over two days at the Computer History Museum in Mountain View, CA. Although the main purpose of the conference was to promote the company's rich set of Java based machne learning algorithms and announce their new products Flow and Play there were quite a few sessions devoted to R...

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