November 2014

High performance JSON streaming in R: Part 1

November 5, 2014 | Jeroen Ooms

The jsonlite stream_in and stream_out functions implement line-by-line processing of JSON data over a connection, such as a socket, url, file or pipe. Thereby we can construct a data processing pipeline that can handle large (or unlimited) amounts of data with limited memory. This post will walk through ...
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Computing Power Curves

November 5, 2014 | Dave Giles

In a recent post I discussed some aspects of the distributions of some common test statistics when the null hypothesis that's being tested is actually false. One of the things that we saw there was that in many cases these distributions are "non-central", with a non-centrality parameter that increases as ... [Read more...]

Computing Power Functions

November 5, 2014 | Dave Giles

In a recent post I discussed some aspects of the distributions of some common test statistics when the null hypothesis that's being tested is actually false. One of the things that we saw there was that in many cases these distributions are "non-central", with a non-centrality parameter that increases as ... [Read more...]

Introducing Revolution R Enterprise V 7.3

November 5, 2014 | Bill Jacobs

by Bill Jacobs Revolution R Enterprise is the industry's first R-based analytics platform that supports a variety of parallel, grid and clustered systems such as Hadoop, Teradata database and Platform LSF Linux grids. Last year, we enhanced Revolution R Enterprise (RRE) to support big data systems, with support for Hadoop. ... [Read more...]

Update on JGBs versus USTs

November 5, 2014 | klr

Given the recent selloff in the Yen, I thought now would be a good time to update my favorite chart from Intended or Unintended Consequences. For a true currency death spiral, rates need to move up rather than down.  It appears we are long way from t... [Read more...]

Tidbits from the Books that Defined S (and R)

November 5, 2014 | Rasmus Bååth

Why R? Because S! R is the open source implementation (and a pun!) of S, a language for statistical computing that was developed at Bell Labs in the late 1970s. After that, the implementation of S underwent a number of major revisions documented in a series of seminal books, often ... [Read more...]

tagcloud: creating tag / word clouds

November 5, 2014 | January

May I present my new package: tagcloud. Tag clouds is for creating, um, tag clouds (aka word clouds). It is based on the code from the wordcloud package, but (i) has no tools for analysing word frequencies, instead (ii) focuses on doing better tag clouds. As to (ii), it adapts ...
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ggplot2: Elegant Graphics for Data Analysis

November 5, 2014 | Daniel Emaasit

ggplot2 is a plotting system for R, based on the grammar of graphics by Hadley Wickham. ggplot2 tries to take the good parts of base and lattice graphics and none of the bad parts. As a contributor to the package, Dr. Dennis Murphy was able to paint a clear picture ... [Read more...]

Interactive Cobb-Douglas Web App with R

November 4, 2014 | Benevolent Planner

I used Shiny to make an interactive cobb-douglass production surface in R. It reacts to user’s share of labor and capital inputs and allows the user to rotate the surface. The contour plot (isoquants) is also dynamic. Shiny works using two R codes stored in the same folder. One ...
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Tweeting at #IMGC14 conference

November 4, 2014 | Petr Simecek

The 28th annual International Mammalian Genome Conference was held over the last week in Bar Harbor, MA. For the first time, the official conference hashtag #IMGC14 was introduced. Twitter shares plummeted 9% next day. Pure coincide? I do not think so!Totally, 79 participants contributed 1546 tweets. Guess who was the Twitter evangelist? ...
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A Look at the World Values Survey

November 4, 2014 | Joseph Rickert

by Peggy Fan Ph.D. Candidate at Stanford's Graduate School of Education Part of my dissertation at Stanford Graduate School of Education, International Comparative Education program, is looking at the World Values Survey (WVS), a cross-national social survey that started in 1981. Since then there has been 6 waves, and the surveys ... [Read more...]

Creating More Effective Graphs

November 4, 2014 | andrew

A few years ago I ordered a copy of the 2005 edition of Creating More Effective Graphs by Naomi Robbins. Somewhat shamefully I admit that the book got buried beneath a deluge of papers and other books and never received the attention it was due. Having recently discovered the R Graph ... [Read more...]

Phase plane analysis in R

November 4, 2014 | Markus Gesmann

The forthcoming R Journal has an interesting article about phaseR: An R Package for Phase Plane Analysis of Autonomous ODE Systems by Michael J. Grayling. The package has some nice functions to analysis one and two dimensional dynamical systems. As an example I use here the FitzHugh-Nagumo system introduced earlier:... [Read more...]

A Little Present For Coldplay

November 3, 2014 | aschinchon

Gravity, release me, and don’t ever hold me down, now my feet won’t touch the ground (Coldplay, Life In Technicolor II) Inspired by this nice post and by this cover of a Coldplay’s album: I have dared to do this using ggplot, polar coordinates and Google Fonts: ...
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