October 2010

ABC lectures [finale]

October 31, 2010 | 0 Comments

The latest version of my ABC slides is on slideshare. To conclude with a pun, I took advantage of the newspaper clipping generator once pointed out by Andrew. (Note that nothing written in the above should be taken seriously.) On the serious side, I managed to cover most of the 300 ...
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Scatter plot with ggplot2

October 31, 2010 | 0 Comments

I decided to go use ggplot2 more frequently and go through everything. For future reference I will start a series of blog posts on ggplot2. Scatter plot: In my next post, I will change the axis labels. [Read more...]

Presenting Immer’s barley data

October 31, 2010 | 0 Comments

Last time I talked about adapting graphs for presentations.  This time I’m putting some of the concepts I discussed there into action, with a presentation of Immer’s barley dataset.  This is a classic dataset, originally published in 1934; in 1993 Bill Cleveland mentioned it in his book Visualising Data on ...
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How to buy a used car with R (part 1)

October 31, 2010 | 0 Comments

I’m in the process of buying a used car. Since I enjoy making these decisions as complicated as possible, I’ve written some R code to scrape relevant websites for informative data. I’ve written this up as a blog entry because I think it’s a decent example ... [Read more...]

Errors in Ghcn Inventories

October 30, 2010 | 0 Comments

In the debate over the accuracy of the global temperature nothing is more evident than errors in the location data for stations in the GHCN inventory. That inventory is the primary source for all the temperature series. One question is “do these mistakes make a difference?” If one believes as ...
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How to Start Using (pgf)Sweave in LyX in One Minute

October 30, 2010 | 0 Comments

regor Gorjanc published an interesting article “Using Sweave with LyX” in R News in 2008, which (I believe) makes it much easier to use Sweave. I use command-line tools a lot every day, but I am still “GUI-addicted”. (I don’t want to comment more about Microsoft Word here.) LyX is ... [Read more...]

A question from the R list

October 30, 2010 | 0 Comments

I am currently working on rectifying the GHCN station list to improve the location information. Its the kind of database work that is mind numbingly tedious and a PITA in R. not because R lacks capabilities, its just tough and not very sexy to matching and fuzzy matching and greping ...
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Findings increasingly novel, scientists say…

October 29, 2010 | 0 Comments

…was the tongue-in-cheek title of an image that I posted to Twitpic this week. It shows the usage of the word “novel” in PubMed article titles over time. As someone correctly pointed out at FriendFeed, it needs to be corrected for total publications per year. It was inspired by a ...
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The stimulus, mapped

October 29, 2010 | 0 Comments

Edward Tufte created this "Lights-On Map", animating the grants under the American Recovery and Investment Act (more commonly known as the Stimulus): Click the image to see the lights come on over time. It's a nice visualization of the distribution of the stimulus projects over the country and time, but ... [Read more...]

SAS vs Open Source

October 29, 2010 | 0 Comments

SAS CEO Jim Goodnight elicited guffaws from the audience during his keynote at JSM this year when he said "I have a problem with government using open source software". Now it seems Goodnight is at the center of another controversy related to open source, having dismissed the growth of open-source ... [Read more...]

What I’ve been up to..

October 29, 2010 | 0 Comments

It's been nearly a year since I posted here and much has changed. The obvious and most important change is a second new addition to our family which I've been blogging about elsewhere. On the work front I was able to publish a paper about some of my ... [Read more...]

World Economic Forum Data Visualization Challenge

October 28, 2010 | 0 Comments

Jaidev Deshpande writes: The World Economic Forum recently posed a data visualization problem. The dataset is a survey of experts from the so called "Agenda Councils" of the WEF. Here are the details. The dataset primarily contains the experts... [Read more...]

Adapting graphs for presentations

October 28, 2010 | 0 Comments

I’ve just finished reading slide:ology by Nancy Duarte. It contains lots of advice about how to convey meaning through aesthetics. The book has a general/business presentation focus, but it got me wondering about how to apply the ideas in a scientific context.  Since graphs from a big ...
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Integrating R with C++: Rcpp, RInside, and RProtobuf

October 28, 2010 | 0 Comments

Last week the R “intergrouplet” at Google invited Dirk Eddelbuettel and Romain Francois to come and give a Tech Talk about their joint work on Rcpp, RInside, and RProtoBuf. Dirk and Romain agreed and also let us share the video of their talk:We were also happy to have John ... [Read more...]

Revolution Analytics’ Chief Scientist

October 28, 2010 | 0 Comments

Lee Edlefsen, who has led the Revolution R development team in Seattle for more than three years, is now the Chief Scientist for Revolution Analytics. With more than 30 years experience in high-performance and statistical computing, this is a great position for Lee. There's more details in the press release linked ... [Read more...]

R is Hot: Part 4

October 28, 2010 | 0 Comments

This is Part 4 of a five-part article series, with new parts published each Thursday. You can download the complete article from the Revolution Analytics website. High Quality Graphics, Made Easy R is especially useful for generating charts and graphics, quickly and easily. The ability to create visual plots of complex ... [Read more...]

Lattice vs. ggplot2

October 28, 2010 | 0 Comments

Both lattice and ggplot2 seem really interesting and worthy of learning. But I only have time to learn one of them, and the choice is not an easy one.Here is an awesome reference; this blog is generally very interesting; and here is something... [Read more...]
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