R 2.15.0 "Easter Beagle" is released

March 30, 2012
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The R core group today announced the availability of R 2.15.0, codenamed "Easter Beagle". If you build R yourself, the new source distribution (including packages for Debian Linux) is available now, and binaries for Windows, MacOS and Linux will be available from your local CRAN mirror over the next couple of days. (As of this writing, Windows binaries are...

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Build 32 bit R on 64 bit Ubuntu by utilizing chroot

March 30, 2012
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In the past, I’ve described how one could build multiarch (64 bit and 32 bit) versions of R on a 64 bit Ubuntu machine. The method based on this thread no longer works as of R 2.13 or 2.14 I believe. I received advice from someone on #R over on freenode (forgot who) a few... Read more »

Comparing Spectra with different math treatments

March 30, 2012
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Comparing Spectra with different math treatments

It is amazing the quantity of graphics you can develop with R, and how you can show and manage  these graphics. Here in the same plot we compare the raw demo spectra, treated with MSC, SNV and with the first derivative (differences between consecu...

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Slow R graphics via SSH

March 30, 2012
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I do most of my R work on a server via SSH.  Viewing graphics (i.e. plot()) can be excruciatingly slow through the SSH pipe, but it's easy to make it fast.  Simply run:        X11.options(type="Xlib")once in the R session.  Tags: linuxgraphicsR

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Slow R graphics via SSH

March 30, 2012
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Slow R graphics via SSH

I do most of my R work on a server via SSH.  Viewing graphics (i.e. plot()) can be excruciatingly slow through the SSH pipe, but it's easy to make it fast.  Simply run:        X11.options(type="Xlib")once in the R session....

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Maths can be cool (to impress your kids)

March 30, 2012
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Maths can be cool (to impress your kids)

Just imagine that your kids need some help, to prepare fishes for April 1st, like Her: "please, Daddy, help us to draw some fishes" Me: "Sure, Daddy is a champion, actually, I do that everyday at work: drawing fishes - and more generally nice stuf...

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Mapped: British, Spanish and Dutch Shipping 1750-1800

March 30, 2012
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Mapped: British, Spanish and Dutch Shipping 1750-1800

I recently stumbled upon a fascinating dataset which co

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R 2.15.0 is released

March 30, 2012
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R 2.15.0 is released

Bellow is the announcement made by Peter Dalgaard: The build system rolled up R-2.15.0.tar.gz (codename “Easter Beagle”) at 9:00 this morning. This is the first release of the 2.15 series and contains several new features and changes; see the list below for details. You can get the source code from http://cran.r-project.org/src/base/R-2/R-2.15.0.tar.gz or wait for it to be mirrored at...

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R 2.15.0 is released!

March 30, 2012
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R 2.15.0 is released!

The new R 2.15.0 is out! You know the drill! Get the source code from here.

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BoRdeaux (France): the first French R useR conference

March 30, 2012
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The first French R useR conference will be held in Bordeaux on July 2-3. The Rencontres R are conceived as a place to present and share ideas on using the R statistical software. This meeting is designed to be a nationwide event where various topics belong, such as graphical tools, applied statistics, biostatistics, bayesian statistics,

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Bootstrap example

March 30, 2012
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Bootstrap example

Bootstrap your way into robust inference. Wow, that was fun to write.. Introduction Say you made a simple regression, now you have your . You wish to know if it is significantly different from (say) zero. In general, people look … Continue reading →

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Slow R graphics via SSH

March 30, 2012
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I do most of my R work on a server via SSH.  Viewing graphics (i.e. plot()) can be excruciatingly slow through the SSH pipe, but it's easy to make it fast.  Simply run:        X11.options(type="Xlib") once in the R session.  Tags:  R

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UPDATE: Install R 2.14.2 or R 2.15 in Debian Squeeze

March 29, 2012
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Since not so long, I upgraded  the version of R that is included in the Debian repositories (2.11.1 in Squeeze) and I was very happy with it since 2010. But there was some packages that I could not install and then, I decided to upgrade R despite ...

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R-bloggers

March 29, 2012
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R-bloggers

OK, like the nightclub Kenan and Kel founded in Rigby’s shop, we all know this blog is ‘duh bomb’ (or will be as I add more than my solitary post). However, there are other good R blogs. I thoroughly recommend signing up to the R-b...

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See how Deloitte uses R for actuarial analysis

March 29, 2012
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Many thanks to Jim Guszcza (Predictive Analytics lead at Deloitte Consulting and Assistant Professor at UW-Madison) who gave a great webinar presentation yesterday on actuarial analysis with R. Jim's demo (starting at the 20 minute mark in the video replay below) is a great way to get a sense of how R is used for exploratory data analysis and...

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Dividing the Sample Set in two (Validation & Training)

March 29, 2012
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Dividing the Sample Set in two (Validation & Training)

We have in the Demo sample set “66” samples.  In this post we´ll see one way to divide the set in two parts: one for “Validation” and another for Training or Calibration.The selection will be random. And we are going to use the command:

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Functional regression, INLA, and how to build the World’s Slowest Fourier Transform

March 29, 2012
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Functional regression, INLA, and how to build the World’s Slowest Fourier Transform

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Psychotherapies PubMed battle

March 29, 2012
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Psychotherapies PubMed battle

Ever wondered how different psychotherapy orientations match up in a PubMed battle? Continue reading to find out and to see how to test this using R and Ggplot2.

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PK models in R and in Julia

March 29, 2012
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1.1 Pharmacokinetic models with an analytic solution Pharmacokinetics is the study of the absorption and elimination of drugs and their metabolites in the body. As described in the wikipedia article there are several parameters, such rate constants,...

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Updates to the Deducer family of packages

March 29, 2012
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Over the past month there have been a number of package updates in the deducer ecosystem. Deducer is a general purpose, extensible, data analysis GUI. It is designed to be a free easy to use alternative to proprietary data analysis software such as SPSS, JMP, and Minitab. It has a menu system to do common

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Using wordcloud on search terms & phrases

March 28, 2012
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Using wordcloud on search terms & phrases

The wordcloud package for R is great, but all the examples I found used the tm package to process a large amount of textual data (web pages, text files, google docs, etc.)But what if you have normalized data where you have a word and its frequency? Or,...

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email habits over time

March 28, 2012
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email habits over time

I was curious if my sleeping/waking habits had really changed over the years – I definitely don’t feel I work as late now as when I was 22, but it’s hard to tell. To test this, I looked over all … Continue reading →

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robust pdf title extraction

March 28, 2012
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I end up with a lot of PDF documents lying around – at last glance, this amounted to a few thousand files. Unfortunately, most of these documents end up with rather obscure names, making it rather annoying to find what … Continue reading →

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tcp timelines with ggplot2

March 28, 2012
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tcp timelines with ggplot2

I’ve come across the need to analyze TCP flows from time to time, and while scripts like flowtime and EasyTimeline are nice, they aren’t really, well, pretty.  ggplot2, on the other hand is, and it turns out to be really easy to … Continue reading →

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SCRIPT for NIR "DEMO" Tutorial – 001

March 28, 2012
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SCRIPT for NIR "DEMO" Tutorial – 001

########### RAW NIR Demo Data##################################demo<-read.table("demo.txt",header=TRUE)VIS<-demoVIS<-as.matrix(VIS)NIR<-demoNIR<-as.matrix(NIR)ALL<-demoALL<-as.matrix(ALL)Protein<-demo...

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Bigger data, better intelligence for government

March 28, 2012
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Tomorrow (at 2PM Eastern on Thursday), the White House White House Office of Science and Technology Policy will host a 90-minute forum on Challenges and Opportunities in Big Data. You can watch the event live at the previous link, and see federal government science heads from OSTP, NSF, NIH, DoE, DoD, DARPA and USGS outline how their agencies are...

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U.S. Soldiers Died from What?

March 28, 2012
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U.S. Soldiers Died from What?

Prior to WWII, the majority of soldiers died from disease and infection. The Invisible Enemy Often Killed You Before Your Political Enemy Imagine the scene: thousands of military men laying on cots, makeshift beds, or the floor ...

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RcppArmadillo 0.2.37 and 0.2.38 released, but not on CRAN

March 28, 2012
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Conrad is readying his fabulous Armadillo C++ template library for linear algebra for a new 3.0.0 release, and started to make pre-releases. His version 2.99.1 came about a good week ago, it took us a few days to make a small required change in RcppAr...

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Go faster R for Google’s summer of code 2012

March 28, 2012
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The R Foundation has been accepted for Google’s summer of code and I thought I would suggest a few ideas for projects. My interests are in optimization and source code analysis, so obviously the suggestions involve these topics. There are an infinite number of possible optimizations that can be applied to code (well, at least

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