March 2011

Day #11 R graphs as nodes

March 24, 2011 | Stageverloop Kris » R

Today my company supervisor isn’t at work so he gave me (and the other students) a task-list. I have to check the availability of the following R scripts. Whether or not they work how they should in Knime. While doing these tasks, at the main tim... [Read more...]

Yeah Sure, Maybe, Well … Okay

March 23, 2011 | Milk Trader

Whoever wrote the book on statistics, probably avoided getting a proper education in literature. At least that's my null hypothesis. The cryptic and awkward presentation of probabilities common amongst the Frequentists (no, not the Latin American Socia...
[Read more...]

Typos sorted, at last!

March 23, 2011 | xi'an

After posting so many entries about typos in my books (making you wonder how there could be any text left!) and postponing their classification for so long, I decided on Saturday afternoon to collect those entries into a comprehensive pdf document that should be more useful for readers. I incidentally ... [Read more...]

jStat: Advanced Statistics using Javascript

March 23, 2011 | Lalit Das

While 'R' is getting enterprise ready, it's no longer the only open source option for advanced statistical programming. jStat.js is the new kid on the block.Things in favor of jStat:Based on Javascript, jQuery - future is assuredLight-weightAbility to ...
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basic ggplot2 network graphs – ver2

March 23, 2011 | Scott Chamberlain

I posted last week a simple function to plot networks using ggplot2 package. Here is version 2. I still need to work on figuring out efficient vertex placement.Changes in version 2:-You have one of three options: use an igraph object, a matrix, or a da...
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RcppArmadillo 0.2.17

March 23, 2011 | Thinking inside the box

Another release (1.1.90) by Conrad Sanderson for his wonderful Armadillo templated C++ library for linear algebra appeared yesterday. Consequently, a new release 0.2.17 of RcppArmadillo, our Rcpp-based integration into R is now on CRAN mirrors. The... [Read more...]

The Register profiles Revolution Analytics

March 23, 2011 | David Smith

Tech news site The Register has just published an in-depth profile of Revolution Analytics. It was great meeting the author Dan Olds at Revolution HQ a couple of weeks ago, and sharing with him why we think the R language is the way forward for data science: modern, applied, large-scale ... [Read more...]

Graphical Display of R Package Dependencies

March 23, 2011 | csgillespie

In some work that I am currently involved in, we have to decide which GUI engine we should use. As an obvious starter, we decided to have a look at what other people are using in their packages. While cran helpfully displays all the R packages that are available, it ... [Read more...]

Downloading S&P 500 Data to R

March 23, 2011 | QuantTrader

The cornerstone of your analysis and quantitative trading algorithms are data. There are lots of different ways how to do it in R (depending of what your investment instruments are). Today I am going to download data from finance.yahoo which are stock ... [Read more...]

sab-R-metrics Sidetrack: Bubble Plots

March 22, 2011 | Millsy

While I had mentioned in my last post that I will cover logistic regression in my next post, I decided that a quick interlude in working with bubble plots would be fun. Bubble plots have become pretty popular recently, especially with all of the Visualization Challenges I've seen around the ... [Read more...]

R again in Google Summer of Code

March 22, 2011 | Larry D'Agostino

I'm a big fan of the Google Summer of Code.  It brings great projects together with a learning opportunity for students.  Once again the R Project was selected to be part of the Google Summer of Code in 2011.  Some other notable mathemat... [Read more...]

Where the heck has JD been?

March 22, 2011 | JD Long

It’s been pointed out to me that I haven’t had any blog posts in a while. It’s true. I’m fairly slack. But in the last few months I’ve changed jobs (same firm, new role), written an R abstraction on top of Hadoop, been to China, ... [Read more...]

Code: extended model support for mtable

March 22, 2011 | Jason

I finally got around to organizing and packaging my complete set of extended model support for mtable in Martin Elff’s memisc library. Here is a list of the models supported: coxph, survreg – Cox proportional hazards models and parametric survival … Continue reading → [Read more...]

More on R-Studio

March 22, 2011 | Daniel Hocking

Here's a link to keyboard shortcuts for the RStudio IDE. RStudio has replaced EMacs, Aquamacs, Tinn-R, Bluefish, and even Komodo Edit as my preferred R IDE/editor.http://gettinggeneticsdone.blogspot.com/2011/03/rstudio-keyboard-shortcut-reference-pdf.h...
[Read more...]

One bicycle for two

March 22, 2011 | xi'an

Robin showed me a mathematical puzzle today that reminded me of a story my grand-father used to tell. When he was young, he and his cousin were working in the same place and on Sundays they used to visit my great-grand-mother in another village. However, they only had one bicycle ... [Read more...]
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