Monthly Archives: March 2010

Rosetta language popularity

March 13, 2010
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Rosetta Code is a community wiki which presents how to solve various programming tasks by different programming languages. Thus, it serves as a dictionary between programming languages, but also as cookbook of programming recipes for a specific language.One unsolved (until today) programming task for R was to rank languages by popularity. I worked on it using the...

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Rcpp 0.7.9

March 12, 2010
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Version 0.7.8 of Rcpp, released just a few days ago contained a nasty bug or two which we noticed when trying to built the initial release of RcppArmadillo on 64-bit platforms. So a quick bug-fix release 0.7.9 is now in Debian and should be on CRAN sh...

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Rcpp 0.7.9

March 12, 2010
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Version 0.7.8 of Rcpp, released just a few days ago contained a nasty bug or two which we noticed when trying to built the initial release of RcppArmadillo on 64-bit platforms.So a quick bug-fix release 0.7.9 is now in Debian and should be on CRA...

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Wrong puzzle of the week [w10]?!

March 12, 2010
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Wrong puzzle of the week [w10]?!

In the weekend supplement to Le Monde, the solution of the rectangle puzzle is given as 32 black squares. I am thus… puzzled!, since my R program there provides a 34 square solution. Am I missing a hidden rectangle in the above?! Given that the solution in Le Monde is not based on a precise

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R workshops in Vancouver

March 12, 2010
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Isabella Ghement of the Ghement Statistical Consulting Company is presenting two R workshops in Vancouver, British Columbia: "An Introduction to the Statistical Software Package R" (April 15-16,2010; 8:30am-4:30pm; BCIT; Vancouver) "Advanced Statistical Modeling Using the Statistical Software Package R" (May 20-21, 2010; 8:30am-4:30pm; BCIT; Vancouver) Click the links for more information and registration details.

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Modified Donchian Band Trend Follower using R, Quantmod, TTR

March 12, 2010
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Modified Donchian Band Trend Follower using R, Quantmod, TTR

I've been toying around with the examples given on the FOSS trading site for some of the great work they've put together in the Quantmod and TTR packages. Those viewers who are looking for a nice (and free) backtesting suite to possibly complement s...

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Package Update Roundup: Feb 2010

March 12, 2010
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This is a list of new or updated packages that were released for R in February, as announced on the r-packages mailing list. To include other updates on this list, please email David Smith. For a complete list of all updates on CRAN, see the CRANberries archive for February 2010. Follow package name links for ratings and other information...

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Guess the Random Seed

March 12, 2010
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tephanie asked in 511 today if we were able to get the random seed which was set by set.seed() but we were only given the random numbers (without knowing the seed). This kind of “hacker” questions sound interesting. One dirty solution should be the brute-force method, e.g: # x: the random vector; # FUN: the

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Because it’s Friday: 3d Mandelbrot

March 12, 2010
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Because it’s Friday: 3d Mandelbrot

To while away your Friday afternoon, why not explore the nooks and crannies of a 3-D version of the Mandelbrot set: And here's how to create your own 2-D Mandelbrot set in R.

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Happy Anniversary NYC R Meetup

March 12, 2010
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Happy Anniversary NYC R Meetup

Today is the one year anniversary of the NYC R Statistical Meetup. Starting as a small group meeting in a crowded conference room, Josh Reich established the meetup as the premiere gathering of data geeks in the tri-state area. Over the past year we have had 10 meetups, and two more upcoming on the

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