Monthly Archives: April 2012

R, Julia and genome wide selection

April 24, 2012
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R, Julia and genome wide selection

— “You are a pussy” emailed my friend. — “Sensu cat?” I replied. — “No. Sensu chicken” blurbed my now ex-friend. What was this about? He read my post on R, Julia and the shiny new thing, which prompted him … Continue reading →

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Insights into Quantile Regression from Arthur Charpentier

April 24, 2012
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Insights into Quantile Regression from Arthur Charpentier

At this Monday’s Montreal R User Group meeting, Arthur Charpentier gave an interesting talk on the subject of quantile regression. One of the main messages I took away from the workshop was that quantile regression can be used to determine if extreme events are becoming more extreme. The example given was hurricane intensity since 1978.

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Varying Window Length for Linear Models on Stocks

April 24, 2012
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Varying Window Length for Linear Models on Stocks

In a previous post, we discussed ideas generated by a Timely Portfolio post about Linear Models on Stock. I wanted to see if there was a relationship between the window length of the running mean of the linear regression slope estimate and the running mean of the correlation between fitted and observed values. The parameters

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How to remember point shape codes in R

April 24, 2012
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How to remember point shape codes in R

I suspect I am not unique in not being able to remember how to control the point shapes in R. Part of this is a documentation problem: no package ever seems to write the shapes down. All packages just use the “usual set” that derives from S-Plus and was carried through base-graphics, to grid, lattice Related posts:

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Heat map visualization of sick day trends in Finland with R, ggplot2 and Google Correlate

April 24, 2012
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Heat map visualization of sick day trends in Finland with R, ggplot2 and Google Correlate

Inspired by Margintale’s post “ggplot2 Time Series Heatmaps” and Google Flu Trends I decided to use a heat map to visualize sick days logged by HeiaHeia.com Finnish users. I got the data from our database, filtering results by country (Finnish users only) in a tab separated form with the first line as the header. Three columns

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Rmetrics financial engineering workshop

April 24, 2012
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For those looking for an in-depth workshop on financial engineering with R, look no further than the R/Rmetrics Workshop and Summer School held annually in beautiful Meielisalp, Switzerland. This is an intimate workshop limited to around 50 participants, and features tutorials from leading practitioners in finance with R. This year's workshop takes plase June 24-28. You can find the...

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Animations in R

April 24, 2012
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Animations in R

Animated charts can be very helpful in illustrating concepts or discovering relationships, which makes them very helpful in teaching and exploratory research. Fortunately, creating animated graphs in R is fairly straightforward, once you have the right tools and understand a few basic principles about how the animations are created. In this article I’ll provide an The post Animations...

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Animations in R

April 24, 2012
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Animations in R

Animated charts can be very helpful in illustrating concepts or discovering relationships, which makes them very helpful in teaching and exploratory research. Fortunately, creating animated graphs in R is fairly straightforward, once you have the right...

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R: Interactive 3D WebGL plot of time-space cube with RGL

April 24, 2012
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R: Interactive 3D WebGL plot of time-space cube with RGL

With the recently relased version of the package RGL (V. 0.92.879) there is a new option to publish 3D plots as an interactive WebGL graphic. Nearly every 3D plot you set up in a RGL window can be exportet via a very easy command. Just plot as usual into your rgl device and then use

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Milano R net meeting

April 24, 2012
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Milano R net meeting

I received the announce of the first Milano R net meeting, and I am glad to post it below. If you are based in Milano area you might think about going. If you are not based in Milano area, you might think about going as well! Milano R net Milano R net is a users

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