Monthly Archives: February 2011

RStudio: New free IDE for R

February 28, 2011
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Just saw the announcement of the availability of Rstudio, a new (free & open source) integrated development environment for R that works on Windows, Mac, and Linux. Judging from the screenshots, it looks like Rstudio supports syntax highlighting for Sweave & easy PDF creation from Sweave code, which is something I haven't seen anywhere else (on Windows at least)....

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Running a Regression in R

February 28, 2011
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Running a Regression in R

I created another video tutorial on R. This time, I discuss R's lm() command and how to use it for a variety of standard applications.Here is the code that goes with the video:Enjoy!

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Plug for RStudio: powerful, free, and easy to use interactive development environment for R

February 28, 2011
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Plug for RStudio: powerful, free, and easy to use interactive development environment for R

(click for a bigger picture)As a longtime SAS user, one obstacle for me in using R professionally has been figuring out a process for saving and testing code across several work sessions and integrating code composition and execution. There are a coup...

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RStudio, new open-source IDE for R

February 28, 2011
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RStudio, new open-source IDE for R

RStudio is a new open-source IDE for R which we’re excited to announce the availability of today. RStudio has interesting features for both new and experienced R developers including code completion, execute from source, searchable history, and support for authoring Sweave documents. RStudio runs on all major desktop platforms (Windows, Mac OS X, Ubuntu, or

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RStudio, new open-source IDE for R

February 28, 2011
By
RStudio, new open-source IDE for R

RStudio is a new open-source IDE for R which we’re excited to announce the availability of today. RStudio has interesting features for both new and experienced R developers including code completion, execute from source, searchable history, and support for authoring Sweave documents. RStudio runs on all major desktop platforms (Windows, Mac OS X, Ubuntu, or

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Example 8.28: should we buy snowstorm insurance?

February 28, 2011
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Example 8.28: should we buy snowstorm insurance?

It's been a long winter so far in New England, with many a snow storm. In this entry, we consider a simulation to complement the analytic solution for a probability problem concerning snow. Consider a company that buys a policy to insure its revenue ...

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R Tutorial Series: Two-Way ANOVA with Unequal Sample Sizes

February 28, 2011
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R Tutorial Series: Two-Way ANOVA with Unequal Sample Sizes

When the sample sizes within the levels of our independent variables are not equal, we have to handle our ANOVA differently than in the typical two-way case. This tutorial will demonstrate how to conduct a two-way ANOVA in R when the sample sizes withi...

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R Tutorial Series: Two-Way ANOVA with Unequal Sample Sizes

February 28, 2011
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R Tutorial Series: Two-Way ANOVA with Unequal Sample Sizes

When the sample sizes within the levels of our independent variables are not equal, we have to handle our ANOVA differently than in the typical two-way case. This tutorial will demonstrate how to conduct a two-way ANOVA in R when the sample sizes withi...

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What $480M of Gross Revenue Looks Like to Groupon

February 28, 2011
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What $480M of Gross Revenue Looks Like to Groupon

On Saturday, the Wall St. Journal posted details of an internal Groupon memo that reported $760 million in revenue last year. The WSJ article came just as I was finishing up a visualization of some data I had collected on … Continue reading →

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Visualizing Soccer League Standings

February 27, 2011
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Visualizing Soccer League Standings

I feel ashamed for this boring title, but hope that the entry can make up for it. This visualization did inspire me, as a comment did point to my Tour de France visualizations. As with all visualizations, we need data first – this sounds trivial, but is sometimes a frustrating show-stopper. After I found the

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