October 2009

useR! 2006

October 30, 2009 | 0 Comments

Last week, I attended the 2006 UseR! conference: here is a (long) summary of some of the talks that took place in Vienna -- since there were up to six simultaneous talks, I could not attend all of them... In this note: 0. General remarks 1. Tutorial:... [Read more...]

R graphics

October 30, 2009 | 0 Comments

I just finished reading Paul Murrel's book, "R graphics". There are two graphical systems in R: the old ("classical" -- in the "graphics" package) one, and the new ("trellis", "lattice", "grid" -- in the "lattice" and "grid" packages) one. The first...
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The grammar of graphics (L. Wilkinson)

October 30, 2009 | 0 Comments

Though this book is supposed to be a description of the graphics infrastructure a statistical system could provide, you can and should also see it as a (huge, colourful) book of statistical plot examples. The author suggests to describe a statistical...
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Statistics with R

October 30, 2009 | 0 Comments

I have just uploaded the new version of my "Statistics with R": http://zoonek2.free.fr/UNIX/48_R/all.htmlThe previous version was one year and a half old, so in spite of the fact I have not had much time to devote to it in the past two years, ... [Read more...]

Use R 2009 Conference

October 30, 2009 | 0 Comments

I did not attend the conference this year, but just read through the presentations. There is some overlap with other R-related conferences, such as R in Finance or the Rmetrics workshop. http://www.agrocampus-ouest.fr/math/useR-2009/ http://www.rinfin...
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Decimal log scale on a plot

October 30, 2009 | 0 Comments

R only does natural (neperian) log scales by default, and this is lame. Here is a simple code to do decimal log scale, pretty much a requirement for scientists… The force(x/y)lim options works for natural and log scales (for the later case, you need to specify the ... [Read more...]

Long R, Short Excel

October 29, 2009 | 0 Comments

R is very speedy statistical package that's like an F-18A Hornet, versus Excel which is like a paper airplane. R is professional sports, Excel is Pop Warner. R is Mona Lisa, Excel is stick figures. R is ... okay, you get the idea. I'm long R, and short...
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Kicking Ass with plyr

October 29, 2009 | 0 Comments

Tonight (October 29, 2009) at 5:30 PM is the Chicago R meetup at Jaks tap. Here’s more info.  I’ll be making a presentation based on my earlier blog post about plyr. The presentation will only be 8 minutes long so I’ve had to pick and choose my info carefully. OK, who ... [Read more...]

Go long on close and sell on open

October 29, 2009 | 0 Comments

I found a description of supposed to be profitable strategy on Bloomberg. The strategy is simple – buy S&P500 index on close and sell it on next day open. So, I tested this claim and got nice P/L curve: Yes, since 1993 this strategy has generated the profit __300%. But, neither ...
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Bioconductor 2.5 is out

October 29, 2009 | 0 Comments

For all bioinformaticians and R users out there: the Bioconductor project  for the analysis and comprehension of genomic data is out! A lot of interesting new stuff! See the full announcement here.
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Tips for Using StatET and Eclipse for Data Analysis in R

October 29, 2009 | 0 Comments

My favourite editor for conducting analysis in R is the StatET plug-in for Eclipse. This post discusses an assortment of tips and tricks that I've discovered to make this editing environment even better.SearchSearch (Control + H): I maintain projects i...
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Using the “foreign” package for data conversion

October 27, 2009 | 0 Comments

I was in a rush to convert a SPSS data into Stata format. Somehow my Stattransfer v.8 for Linux was lost and I did not want pause my work and go back to Windows just to get this one file converted. So fire Emacs+ESS+R, load the "foreign" package, ...
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R 2.10.0 is Out!

October 26, 2009 | 0 Comments

The new R 2.10.0 is out! Get it from here. If you like take a look at these posts for some miscellaneous advices to make the upgrade easier. Fell free to contribute with suggestions about how to upgrade your R installation.
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Free statistics e-books for download

October 25, 2009 | 0 Comments

This post will eventually grow to hold a wide list of books on statistics (e-books, pdf books and so on) that are available for free download.  But for now we’ll start off with just one several books: The Elements of Statistical Learning written by Trevor Hastie, Robert Tibshirani and ... [Read more...]
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