Local R User Group Panel from useR! 2010 (Video)

July 24, 2010
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As I mentioned last week, I will be hosting videos of several of the keynote speakers from this year’s useR! 2010 conference at the video Rchive. As it happens, the first video I was able to upload was the panel discussion we held on starting local R user groups. I have uploaded the video,

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useR! 2010 – Local R User Group Panel

July 24, 2010
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Panel discussion about forming local R user groups from useR! 2010. Panelists include, Jim Porzak (San Francisco Bay Area), David Smith (REvolution Analytics), John C. Nash (Ottawa, Canada), Drew Conway (New York City), Szilard Pafka (Los Angeles), M...

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How to calculate with dates and hours in R

July 24, 2010
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How to calculate with dates and hours in R

A while ago I was asked whether calculating with datums and hours is possible in R. Especially, if you added an hours to 23:45 (say Jan 1, 2010) , would R know to jump to the next day – 00:45 (jan 2, 2010)? The answer is yes. Our only job is to tell R in

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useR! 2010 done and dusted

July 23, 2010
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useR! 2010 done and dusted

:

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Installing rgdal on Mac OS X

July 23, 2010
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The rgdal package contains bindings from R to the GDAL (Geospatial Data Abstraction Library) as well as the PROJ library. It is a dependency for numerous spatial statistics packages. Note that the binaries on the rgdal homepage are outdated — the most up-to-date version of the rgdal package can be found on CRAN. Unsurprisingly, rgdal

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Hello world!

July 23, 2010
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Throughout the course of my research, I come across a lot of obstacles and nuisances that are either undocumented or documented poorly.  Therefore, I decided to throw up this blog as a repository of sorts to store all of these little tidbits of information with the hope that it will save somebody somewhere a few minutes of

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Thoroughly Unusual Itches

July 23, 2010
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Thoroughly Unusual Itches

I have found myself over the years in a rather awkward situation.  I work in old-school, bricks and mortar industry IT shops for the most part.  However, I love many open source projects and identify with many of the values of start up cultur...

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The counterfactual GPS!

July 23, 2010
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The counterfactual GPS!

WHAT IF YOUR GPS TOLD YOU WHAT WOULD HAVE HAPPENED IF YOU HAD TAKEN THE OTHER ROUTE? Not long ago, your Decision Science News editor was planning a trip to a book group meeting along with another member. The monthly book group takes place in Cove Neck Long Island, about an hour East of Manhattan.

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Why building R packages is good for you

July 23, 2010
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Basically every function you use in R is part of a package (often the base or stats one). Most of the advances routines, such as the differential equations solvers in simecol are brought to R in the form of Fortran (…)Read the rest of this entry »

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Turning your data into a 3d chart

July 23, 2010
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Turning your data into a 3d chart

Some charts are to help you analyse data. Some charts are to wow people. 3d charts are often the latter, but occasionally the former. In this post, we’ll look at how to turn your data into a 3d chart. Let’s use the data from this previous post. Use the code which turns the .csv spreadsheet

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Plaudits for R

July 23, 2010
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I just discovered that R core member Paul Murrell has been maintain a list of plaudits for R: newspaper articles, book reviews, remarks on mailing lists and blogs, and even gratitudes from individual R users. He's collected dozens of entries since 2001 -- great materials here if you ever need more evidence of the awesomeness of R. Paul Murrell:...

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Building an R package (under Windows) without C, C++ or FORTRAN code

July 23, 2010
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Building an R package (under Windows) without C, C++ or FORTRAN code

Why build and R package? It basically boils down to be able to brag at your local pub that a new version of YOUR package is on CRAN as of 7 p.m. CET. But seriously, if you’ve produced some function that other people might benefit (or have ordered them) from using them, like your boss,

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Creating a Presentation with LaTeX Beamer – Equations and tikz

July 23, 2010
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Creating a Presentation with LaTeX Beamer – Equations and tikz

Many presentations created using LaTeX beamer included mathematical equations and these can be easily included in a presentation and in this post we will consider using the tikz package to add various interesting elements to equations, such as lines between text on a slide and part of an equation. Fast Tube by Casper The examples on this

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UseR! 2010 day 1

July 22, 2010
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Just a couple of quick notes about the first day of talks at useR! 2010. It's been a jam-packed schedule -- so many good talks to see and people to meet, I just wish I had more time for it all! One stand-out for me so far has been Frank Harrell's keynote lecture Information Allergy, on the dangers of...

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Quick scatterplot with associated histograms

July 22, 2010
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Quick scatterplot with associated histograms

R can produce some beautiful graphics, and there are some excellent packages, such as lattice and ggplot2 to represent data in original ways.  But sometimes, all you want to do is explore the realtionship between pairs of variables with the minimum of fuss. In this post we’ll use the data which we imported in the

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Update to ‘Basic R’ eBook

July 22, 2010
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(This article was first published on Rmetrics blogs, and kindly contributed to R-bloggers) To leave a comment for the author, please follow the link and comment on his blog: Rmetrics blogs. R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web...

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BP Oil and Gas Recovery

July 21, 2010
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BP Oil and Gas Recovery

As mentioned in a previous post, the US Department of Energy has been providing data about the Deepwater Horizon as it becomes available.  Recently, the amount of oil and gas recovered was made available.  The spreadsheet includes a grap...

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Bugs [genuine]

July 21, 2010
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Bugs [genuine]

Nothing related with programming, I am afraid! Just a few bugs visiting my passion vine… I find the green bugs quite interesting with their back “engravings”, even though they are most likely pests … Filed under: pictures, ...

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My Talk on Animations at useR! 2010 (NIST, Gaithersburg)

July 21, 2010
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My Talk on Animations at useR! 2010 (NIST, Gaithersburg)

As every useR knows, the useR! 2010 conference is being held at NIST in Gaithersburg these days. I have just finished my talk on the R package animation this afternoon. Here are my slides and R code for those who are interested: Have fun, even if you are a PhD! Related Postsalphahull: an R Package

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Inside-R.org, a new community site for R

July 21, 2010
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As recently as a couple of years ago, finding information about R in the Web was hard. Other than the canonical content and mailing list archives at the official R project site, www.r-project.org, there wasn't too much else dedicated to R on the web -- and what was there was hard to find on Google without the help of...

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R Cheat Sheets and more

July 21, 2010
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R Cheat Sheets and more

Here you can find a collection of cheat sheets useful to R developers. Visit the devcheatsheet homepage to inspect cheat sheets and quick reference card for other programming languages and applications.

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R Cheat Sheets and more

July 21, 2010
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R Cheat Sheets and more

Here you can find a collection of cheat sheets useful to R developers. Visit the devcheatsheet homepage to inspect cheat sheets and quick reference card for other programming languages and applications.

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Reminder: Launch Party for Inside-R.org tonight

July 21, 2010
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If you're in the DC area (attending useR!2010, perhaps) this evening, Revolution Analytics (in conjunction with the DC Area R User Group) is hosting a party to celebrate the launch of Inside-R.org at the Crowne Plaza in Rockville at 8PM. Come along for drinks and food, mingle with other R users, hear about the new community site for R,...

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Matrix scatterplot of the Airquality data using lattice

July 20, 2010
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Matrix scatterplot of the Airquality data using lattice

In this post we will build on the last one, and create a matrix scatterplot. The package lattice allows for some really excellent graphics. In case you haven’t already seen it I recommend the R Graph Gallery for some examples of what it can do – browse the graphics by package used to create them.

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Getting going – importing data and plotting a simple graphic

July 20, 2010
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Getting going – importing data and plotting a simple graphic

The most difficult part of the learning curve in R is often getting going – many datasets are pre-installed in the packages and organised, so it is difficult to see how you to import your own data into R.  This post takes you step by step through the process of making a table from a

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New R User Group in Slovenia

July 20, 2010
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The new R User Group in Ljubljana, Slovenia is giving the Sydney group a run for the money when it comes to the best user group name. It's called Anonymous Rcoholics -- great name! You can join the group at the link below. Discussions are in English and Slovene. Google Groups: Anonymous Rcoholics

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userR! 2010 Videos to be Hosted at Rchive

July 20, 2010
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Today, I am packing up the car and heading south to my old home, Washington, DC, for the useR! 2010 conference, which is being held at the National Institute of Standards and Technology. Incidentally, where I was an intern in the Information Technology Lab during college. If you are not able to make the trip to

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Analysing the ISMB 2010 meeting using R

July 20, 2010
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Analysing the ISMB 2010 meeting using R

The colossus of bioinformatics meetings, ISMB, convened in Boston this year from July 9 – 13. As in recent years, the meeting was covered online at its website, FriendFeed and Twitter. I thought it would be fun to run a quick analysis of activity at the FriendFeed room using R. 1. Fetch the data We

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The wonderful world of vim

July 20, 2010
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The wonderful world of vim

When searching for a way to recover control carriage return symbols ^M into genuine ones (under vim), I found this handy page of vim tips. And then saw that the enthusiastic author had even a blog about vim! Obviously, this post will be meaningless for all readers not aware of the joys of the vim

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