Monthly Archives: July 2010

New versions of plyr, ggplot2 released

July 6, 2010
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Hadley Wickham has announced that new versions of his popular grammar-of-graphics charting package ggplot2 and his general-purpose data reshaping tool plyr for R are now available. plyr boasts several new features, most notably a new join function which should simplify what can sometimes be a difficult process in R: merging two data sets. A simplified SQL-like terminology should make...

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Example 8.1: Digits of Pi

July 6, 2010
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Example 8.1: Digits of Pi

Do the digits of Pi appear in a random order? If so, the trillions of digits of Pi calculated can serve as a useful random number generator. This post was inspired by this entry on Matt Asher's blog. Generating pseudo-random numbers is a key piece o...

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R goes to StackExchange

July 6, 2010
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R goes to StackExchange

“What’s the big deal? We already have the r-help mailing list.” No, it’s a big deal. Really. Have you forgotten the joys of being a first-year R user, either begging advice off of friends or using Google to search archives of the R-help list? (Firefox has a dedicated search add-on for the R-help archives.) Yes,

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oro.nifti 0.2.0

July 6, 2010
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The latest version of oro.nifti (0.2.0) has been released on CRAN.  New features include:Reduced overall size of the package by an additional 50% This is a 75% reduction in total from version 0.1.4Four-dimensional acquisitions are now re-orient...

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New versions for ggplot2 (0.8.8) and plyr (1.0) were released today

July 6, 2010
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New versions for ggplot2 (0.8.8) and plyr (1.0) were released today

As prolific as the CRAN website is of packages, there are several packages to R that succeeds in standing out for their wide spread use (and quality), Hadley Wickhams ggplot2 and plyr are two such packages. And today (through twitter) Hadley has updates the rest of us with the news: just released new versions of plyr and ggplot2. source...

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Creating a Presentation with LaTeX Beamer – Basic Slides

July 5, 2010
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Creating a Presentation with LaTeX Beamer – Basic Slides

In a previous post we looked at using the LaTeX beamer package to create presentations. Given a title page and outline of a presentation the next stage will be to create the content that appears in various slides of the presentation. Fast Tube by Casper To create a slide we make use of the frame environment and

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Ajax using JQuery to Sinatra (and a Barplot using R)

July 5, 2010
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Ajax using JQuery to Sinatra (and a Barplot using R)

Part of what attracted me to R was the ease and efficiency in using the language for tasks for which it was designed.  R is a tool among that can be used to do great things with minimal effort.  This post illustrates some other tools and tech...

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Go Guerrill… R on Your Data in August

July 5, 2010
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Go Guerrill… R on Your Data in August

Only one month to go! Register now for the Guerrilla Data Analysis Techniques (GDAT) class to be held during the week of August 9-13, 2010. The focus will be on using R and the PDQ-R for computer performance analysis and capacity planning.(Click on t...

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Prime Parallels for Load Balancing

July 5, 2010
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Prime Parallels for Load Balancing

Having finally popped the stack on computing prime numbers with R in Part II and Part III, we are now in a position to discuss their relevance for computational scalability.My original intent was to show how poor partitioning of a workload can defeat the linear scalability expected when full parallelism is otherwise attainable, i.e., zero...

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Hacker News Religion Poll

July 5, 2010
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Hacker News Religion Poll

Hacker News user post polls from time to time - the following code constructs a bar chart based upon the responses to a recent poll on the stated religious affiliation of Hacker news users (parsed straight from the site).  The chart above is as of...

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