2014

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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Central and Non-Central Distributions

November 3, 2014 | Dave Giles

Let's imagine that you're teaching an econometrics class that features hypothesis testing. It may be an elementary introduction to the topic itself; or it may be a more detailed discussion of a particular testing problem. We're not talking here about a course on Bayesian econometrics, so in all likelihood you'll ... [Read more...]

Running R in the Azure ML cloud

November 3, 2014 | David Smith

The key to making data science successful is making sure you can deploy the machine learning code that data scientists create into applications that rely on the results of the analysis. Microsoft has tackled this problem with Azure ML: machine learning in the cloud. This short video neatly summarizes the ... [Read more...]

R: What to do when help doesn’t arrive

November 3, 2014 | Murtaza Haider

R is great when it works. Not so much, when it doesn’t. Specifically, this becomes a concern when the packages are not fully illustrated in the accompanied help documentation, and the author/s of the package don’t respond (in time).I am not suggesting that the package authors ... [Read more...]

Shapefiles from Isodensity Curves

November 3, 2014 | arthur charpentier

Recently, with @3wen, we wanted to play with isodensity curves. The problem is that it is difficult to get – numerically – the equation of the contour (even if we can easily plot it). Consider the following surface (just for fun, in order to illustrate the idea) __ f=function(x,y) x*... [Read more...]

R 3.1.2 release (and upgrading for Windows users)

November 3, 2014 | Tal Galili

R 3.1.2 (codename “Pumpkin Helmet“) was released last week. You can get the latest binaries version from here. (or the .tar.gz source code from here). The full list of new features and bug fixes is provided below. Upgrading to R 3.1.2 on Windows If you are using Windows you can easily ...
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Yearly Topic Trend in PubMed

November 3, 2014 | R on Guangchuang Yu

I found an R script in R-blogger that can be used to track PubMed trend. The script needs Perl package TGen-EUtils to perform query and it is not available now. It's not difficult to query Pubmed record in R. We can use RCurl package to fetch and use XML package ...
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