Monthly Archives: February 2011

Algorithmic Trading in R: Available Information

February 12, 2011
By
Algorithmic Trading in R: Available Information

After digging through different blogs and info on the web I found an amazingly strong and developping community supporting R for specific applications in algorithmic trading. Thereafter I present some of the major information that I believe are essenti...

Read more »

Simulating second difference using Zelig

February 11, 2011
By

I am trying to simulate second difference using Zelig, here is my code:--------------------------------------------------------data(turnout)# estimationz.out <- zelig(vote ~ race*age + educate + income,            ...

Read more »

Where should you publish that next paper?

February 11, 2011
By
Where should you publish that next paper?

Like many academics, Arthur Charpentier thinks a lot about publishing papers in journals. Specifically, we wondered if there was a way to figure out which journal was the best place to publish his next paper and have it accepted: I was wondering if there were clusters of journals, i.e. journals that publish almost the same kind of articles (so...

Read more »

UseR Meetup at Google San Francisco

February 11, 2011
By
UseR Meetup at Google San Francisco

Earlier this week, Google hosted the Bay Area useR Group at our San Francisco office. Over 40 attendees showed up to hear Dylan Beaudette from UC Davis give a presentation about investigating soil genesis and geography with R (PDF). Dylan has been using...

Read more »

Rounded Corners in ggplot2 Graphics

February 11, 2011
By
Rounded Corners in ggplot2 Graphics

Last night, while working on something else that I want to finish, I ended up indulging in a bit of "yak shaving". I wondered how easy it would be to generate graphics in ggplot2 with rounded corners. I don't think that there is any nativ...

Read more »

Le Monde puzzle [#5]

February 10, 2011
By
Le Monde puzzle [#5]

Another Sudoku-like puzzle from the weekend edition of Le Monde. The object it starts with is a 9×9 table where each entry is an integer and where neighbours take adjacent values. (Neighbours are defined as north, west, south and east of an entry.) The question is about whether or not it is possible to find

Read more »

R overtakes SAS and Matlab in programming language popularity

February 10, 2011
By

Tiobe Software ranks the popularity of programming languages based on references in search engines. While the methodology might be debated in terms of the absolute rankings it produces, it is quite interesting to see how the rankings fluctuate over time: Tiobe has produced a monthly report of rankings based on this methodology since 2001. In the Tiobe Programming Community...

Read more »

Stata or R

February 10, 2011
By
Stata or R

Recently I came across a complex model written in Access with complex SQL queries all over the place. The engineer who was maintaining it and I did some analysis and agreed that the model was using SQL in an unnatural way (things SQL isn't good at) - c...

Read more »

When will my papers appear as references (if they do…) ?

February 10, 2011
By
When will my papers appear as references (if they do…) ?

Following my post on citations in academic journals, I wanted to go one step further in the understanding of the dynamic of citations. So here, the dataset looks like that: for each article, we have the name of the journal, the year of publicatio...

Read more »

Model weights for model choice

February 9, 2011
By
Model weights for model choice

An ‘Og reader. Emmanuel Charpentier, sent me the following email about model choice: I read with great interest your critique of Peter Congdon’s 2006 paper (CSDA, 50(2):346-357) proposing a method of estimation of posterior model probabilities based on improper distributions for parameters not present in the model inder examination, as well as a more general

Read more »

Sponsors

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)