Monthly Archives: April 2010

Experiments with igraph

April 21, 2010
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Experiments with igraph

Networks – social and biological – are all the rage, just now. Indeed, a recent entry at Duncan’s QOTD described the “hairball” network representation as the dominant cultural icon in molecular biology. I’ve not had occasion to explore networks “professionally”, but have always been fascinated by both networks and the tools used to analyse them.

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R / Finance 2010 presentations

April 20, 2010
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Last Friday and Saturday the second R / Finance conference took place in Chicago on the UIC campus. As a co-organizer, it was a great pleasure to see so many users of R in Finance---from both industry and academia---come to Chicago to discuss and sh...

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R / Finance 2010 presentations

April 20, 2010
By

Last Friday and Saturday the second R / Finance conference took place in Chicago on the UIC campus. As a co-organizer, it was a great pleasure to see so many users of R in Finance---from both industry and academia---come to Chicago to discuss and shar...

Read more »

R / Finance 2010 presentations

April 20, 2010
By

Last Friday and Saturday the second R / Finance conference took place in Chicago on the UIC campus. As a co-organizer, it was a great pleasure to see so many users of R in Finance---from both industry and academia---come to Chicago to discuss and sh...

Read more »

Book Review – ggplot 2: Elegant Graphics for Data Analysis by Hadley Wickham (Springer 2009)

April 20, 2010
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Book Review – ggplot 2: Elegant Graphics for Data Analysis by Hadley Wickham (Springer 2009)

Order this book from Amazon This book is written by the author of the ggplot2 package for R, which is a package with a design inspired by the grammar of graphics and can remove some of the effort required to put together impressive graphs. The book is just under 200 pages and covers a

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Data I/O performance tips

April 20, 2010
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The R tag on StackOverflow recently topped 1000 questions, and continues to be a great community resource for practical tips on using the R language for data analysis and visualization. To take one example, "Efficiency of operations on R data structures" has been answered with some great tips on efficiently getting data in and out of the R system....

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RClimate Script: Pacific Decadal Oscillation Trend

April 19, 2010
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RClimate Script: Pacific Decadal Oscillation Trend

This RClimate Script lets users retrieve and plot the monthly and moving average  Pacific Decadal Oscillation (PDO) data  from the University of Washington’s JISAO website. The script retrieves the PDO data from January, 1900 until latest month available at time … Continue reading →

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R and the Next Big Thing

April 19, 2010
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I've been travelling for the past few days (for the R/Finance 2010 conference in Chicago), so I'd missed much of the reaction to AnnMaria De Mars' article last week where she claimed that "R is an epic fail". Understandably, that inflammatory statement provoked many reactions from the R community on Twitter and in the blogosphere. (I suspect the fact...

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A stateful C function for R: parsing Fasta sequences

April 19, 2010
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In the following post, I'll create a C extension for R. This extension will iterate over all the FASTA sequences in a file and will return a pair(name,sequence) for each sequence, that is to say that I won't store all the sequences in memory.The C code...

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A stateful C function for R: parsing Fasta sequences

April 19, 2010
By

In the following post, I'll create a C extension for R. This extension will iterate over all the FASTA sequences in a file and will return a pair(name,sequence) for each sequence, that is to say that I won't store all the sequences in memory.The C code...

Read more »