Travis-CI to Github Pages

Travis-CI to Github Pages I don't remember how I got on this, but I believe I had a recent twitter exchange with some persons (or saw it fly by) about pushing R package vignettes to the web after building and checking on travis-ci. Hadley Wickham pointed to using such a scheme to push the web version of his book...

Read more »

High performance JSON streaming in R: Part 1

November 5, 2014
By
High performance JSON streaming in R: Part 1

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 some examples...

Read more »

Net Promoter Mixture Modeling: Can a Single Likelihood Rating Reveal Customer Segments?

November 5, 2014
By
Net Promoter Mixture Modeling: Can a Single Likelihood Rating Reveal Customer Segments?

Net Promoter believes that customers come in one of three forms: promoters (happy yellows), passives (neutral grays), or detractors (angry reds). Cluster identification is relatively easy for all you need to do is ask the "ultimate question" concerning...

Read more »

Easy to use option settings management with the ‘settings’ package

November 5, 2014
By

Last week I released a new package called settings. It grew out of my frustration built up during several small projects where I'm generating heavily parameterized d3/js output. What I wanted was support to define a whole bunch of option … Continue reading →

Read more »

Computing Power Functions

November 5, 2014
By
Computing Power Functions

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 we move further and further away from the...

Read more »

Introducing Revolution R Enterprise V 7.3

November 5, 2014
By

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. We continued expansion of RRE in 2014, adding support...

Read more »

Update on JGBs versus USTs

November 5, 2014
By

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
By
Tidbits from the Books that Defined S (and R)

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 just referred to by the color of their cover: The...

Read more »

How to extract Google Analytics data in R using RGoogleAnalytics

November 5, 2014
By
How to extract Google Analytics data in R using RGoogleAnalytics

I am extremely thrilled to announce that RGoogleAnalytics was released recently by CRAN. R is already a swiss army knife for data analysis largely due its 6000 libraries. What this means is that digital analysts can now fully use the analytical capabilities of R to fully explore their Google Analytics Data. In this post, we will... Read More The post...

Read more »

Tweeting at #IMGC14 conference

November 4, 2014
By
Tweeting at #IMGC14 conference

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? The...

Read more »

A Look at the World Values Survey

November 4, 2014
By
A Look at the World Values Survey

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 include questions that capture the demographic, behaviors, personal...

Read more »

Analyzing coverage of R unit tests in packages – the {testCoverage} package

November 4, 2014
By
Analyzing coverage of R unit tests in packages – the {testCoverage} package

(guest post by Andy Nicholls and the team of Mango Business Solutions) Introduction Testing is a crucial component in ensuring that the correct analyses are deployed. However it is often considered unglamorous; a poor relation in terms of the time and resources allocated to it in the process of developing a package. But with the

Read more »

Creating More Effective Graphs

November 4, 2014
By
Creating More Effective Graphs

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 Catalog, which implements many

Read more »

Phase plane analysis in R

November 4, 2014
By
Phase plane analysis in R

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:begin{align}dot{v}=&2 (w + v - frac{1}{3}v^3)...

Read more »

A Little Present For Coldplay

November 3, 2014
By
A Little Present For Coldplay

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: Coldplay: feel free to use it for some future album.

Read more »

Central and Non-Central Distributions

November 3, 2014
By
Central and Non-Central Distributions

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 be following the "classical" Neyman-Pearson...

Read more »

Make your own hotly criticised circle graph!!!

November 3, 2014
By
Make your own hotly criticised circle graph!!!

Make your own hotly criticized circle graph! The recent critical post on R-bloggers has got me wanting to make my own bubble graphs despite the popular criticism of the graph. After some attempts I have produced something that looks similar but needs s...

Read more »

Running R in the Azure ML cloud

November 3, 2014
By

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 process of deploying R code to the cloud in...

Read more »

R: What to do when help doesn’t arrive

November 3, 2014
By

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 should respond to every email that they receive. My request is that...

Read more »

Hadley Wickham’s dplyr tutorial at useR! 2014, Part 2

November 3, 2014
By
hhhhhhhhhhhhhhhhhhhhh

Part 2 of the dplyr tutorial is now available! Hadley will be covering Grouped Mutate/Filter, Joins,...

Read more »

Shapefiles from Isodensity Curves

November 3, 2014
By
Shapefiles from Isodensity Curves

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*y+(1-x)*(1-y) > u=v=seq(0,1,length=21) > v=seq(0,1,length=11) > f=outer(u,v,f) > persp(u,v,f,theta=angle,phi=10,box=TRUE, +...

Read more »

Let’s Do Some MORE Hierarchical Bayes Choice Modeling in R!

November 3, 2014
By
Let’s Do Some MORE Hierarchical Bayes Choice Modeling in R!

R enables us to "test drive" statistical models by running simulations and analyzing actual data. We can look at the output and get some sense of how the whole thing works. The goal is to provide a realistic application that is not too difficult to fol...

Read more »

Seeking Volatility and Leverage

November 3, 2014
By
Seeking Volatility and Leverage

So Harry Long recently posted several articles, a couple of them all that have variations on a theme of a … Continue reading →

Read more »

R 3.1.2 release (and upgrading for Windows users)

November 3, 2014
By
R 3.1.2 release (and upgrading for Windows users)

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 upgrade to the latest version of R using the installr

Read more »

Analysing a randomised complete block design with vegan

November 3, 2014
By
Analysing a randomised complete block design with vegan

It has been a long time coming. Vegan now has in-built, native ability to use restricted permutation designs when testing effects in constrained ordinations and in range of other methods. This new-found functionality comes courtesy of Jari (mainly) and my efforts to have vegan permutation routines use the permute package. Jari also cooked up a standard interface...

Read more »

Variability of weather forecasts

November 2, 2014
By
Variability of weather forecasts

Have you wondered how stable are weather forecasts? Since curiosity + R = fun, let’s do a little test. I’ve used a function getWeatherForecast {SmarterPoland} (github release) to download weather forecasts from the Dark Sky API. Hourly forecasts are downloaded every 10 minutes and stored in this repository based on archivist package (it’s easier to

Read more »

RcppArmadillo 0.4.500.0

November 2, 2014
By

A few days ago, Conrad provided another minor release of Armadillo. Once again, I had created a GitHub-only pre-release of his pre-release which was tested against (then) all ninety (!!) CRAN dependents of our RcppArmadillo package, providing a further test for Conrad's code and uploaded RcppArmadillo 0.4.500.0 to CRAN and Debian once his...

Read more »

It’s Amazing How Well Dumb Things [Get Marketed]

November 2, 2014
By
It’s Amazing How Well Dumb Things [Get Marketed]

Recently, Harry Long posted not one but four new articles on Seeking Alpha called It’s Amazing How Well Dumb Things … Continue reading →

Read more »

Tuning Laplaces Demon IV

November 2, 2014
By
Tuning Laplaces Demon IV

This is the last post of testing Laplaces Demon algorithms. In the last algorithms there are some which are completely skipped because they are not suitable for the problem. Reversible Jump is for variable selection. Sequential Metropolis-within-Gibbs,...

Read more »