February 2010

Making publication-ready tables with xtable

February 12, 2010 | David Smith

When you use R at the command-line, the textual output is limited by the medium: one monospaced font, with no typesetting of any kind. That's great when you're doing exploratory analysis, but what about when you want to include R output in a report or publication? In other words, what ... [Read more...]

One-way ANOVA (cont.)

February 12, 2010 | Ralph

In a previous post we considered using R to fit one-way ANOVA models to data. In this post we consider a few additional ways that we can look at the analysis. In the analysis we made use of the linear model function lm and the analysis could be conducted using ...
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Self Aware Classes

February 11, 2010 | R Tips

I thought this up the other night but I'm not sure where I'm going to use it. But I thought that I would through it out there anyway, maybe it will solve all of someone else's problems. I was thinking about classes in R and R is SO NOT object ... [Read more...]

Handling hierarchical data structure in R

February 11, 2010 | Shige

R has a comprehensive set of tools for the handling of hierarchical data structure. The most widely used package is probably "nlme" and "lme4", contributed by Douglas Bates and colleagues. While "nlme" is older and probably more mature than "...
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Future of Open Source Survey

February 11, 2010 | David Smith

Our good friends at North Bridge Venture Partners have just opened the 2010 Future of Open Source Survey, an annual look at the state of open source technology and business models, the driving factors in rising adoption of open source products and how the market for open-source software is evolving. Anyone ... [Read more...]

Two New Soils-Related KMZ Demos

February 10, 2010 | dylan

LCC KMZ Soil Texture KMZ   Forgot to post these KMZ files: 1-km scale, aggregate LCC and soil texture data, derived from SSURGO. These are part of a series of KMZ / raster datasets that will be published soon. See attached files at the bottom of the page. Enjoy! read more
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Video: What is R?

February 10, 2010 | David Smith

By popular demand, we've made the video of our 30-minute webcast "The R Project" available on YouTube so that everyone can easily watch it. If you (or a friend!) have ever wondered what this R thing is all about, this is the video for you. Here's the first part: Because ... [Read more...]

Loglinear models using R

February 10, 2010 | Shige

For those sociologists who want to estimate complicated loglinear models (e.g. Goodman's RC model) using R, the package "VGAM" seems to be a good choice.
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Speeding up simulations with Amazon EC2

February 10, 2010 | David Smith

Over at Cerebral Mastication, JD Long tells a characteristically entertaining and informative story about how he uses R to run stochastic simulations of insurance portfolios and reinsurance treaties. A typical job involves 10,000 simulations, and when each estimate takes over 20 seconds you're talking some serious time to get the job done. ... [Read more...]

Typos in Chapters 1, 4 & 8

February 10, 2010 | xi'an

Thomas Clerc from Fribourg pointed out an embarassing typo in Chapter 8 of “Introducing Monte Carlo Methods with R”, namely that I defined on page 247 the complex number as the squared root of 1 and not of -1! Not that this impacts much on the remainder of the book but still an ... [Read more...]

Package Update Roundup: Dec 2009 – Jan 2010

February 9, 2010 | David Smith

A special double edition of the Package Update Roundup this month! This is a list of new or updated packages that were released for R in December and January, as announced on the r-packages mailing list. To include other updates on this list, please email David Smith. For a complete ... [Read more...]
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