## Data from last post

March 1, 2011
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Posting the code I used in the last post wasn't that useful unless I also posted the data set. Here's the data. These are made up data, but it is a nice data set for illustrating how to conduct a regression. Enjoy!

## Surprising sudoku

March 1, 2011
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> printSudoku(z) +-------+-------+-------+ |   9   |       | 7   5 | |     6 |       |   9   | | 4 5 3 | 1 7   | 2 8   | +-------+-------+-------+ |     5 |     7 |   6   | | 1   9 | 6 8   |       | |   8   |   3   |     1 | +-------+-------+-------+ | 7   2 |

## RStudio: Easy to Use Interface For R and Google Analytics Data #measure Part One: Setup

February 28, 2011
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RStudio: FOSS Interface to R The limitations of widely used existing business solutions for statistical programming have led many organizations previously opposed to FOSS solutions deploy R. With the release of RStudio the bar to gain entry into the world … Continue reading →RStudio: Easy to Use Interface For R and Google Analytics Data #measure Part One:...

## RStudio: just what I’ve been looking for

February 28, 2011
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For many years I used RWinEdt as my text editor for R code, but when WinEdt 6.0 came out, RWinEdt stopped working. So I’ve been looking for something to replace it. I’ve tried Tinn-R, NppToR, Eclipse with StatET and a couple of other editors, but nothing was quite right. Then yesterday, out of the blue,

## The RStudio IDE: first impressions are positive

February 28, 2011
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Integrated development environments (IDEs) are software development tools, providing an interface that enables you to write, debug, run and view the output of your code. Whether you need an IDE or find them useful depends very much on your own preferences and style of working. In my own case for example, I’ve tried both Eclipse

## New open-source IDE for R in beta test

February 28, 2011
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Rstudio, a new open-source IDE for R, has just been announced and is now available for beta test on Windows, MacOS, and Ubuntu. It works with an existing installation of R (2.11.1 or above) on your desktop, and is also available as a server version for Linux, where the IDE runs in your browser. It looks like an interesting...

## Tips for Using our Google Earth Interface to SoilWeb

February 28, 2011
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GE SoilWeb Demo The folks in Lincoln recently changed the links to the OSDs from http:// to https:// style URLs... which seems to cause problems for new versions of Google Earth. I have noticed that when clicking on soil profile sketches an error is re...

## Rstudio

February 28, 2011
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Rstudio, an open source cross-platform IDE for R, seems to be really attractive. It probably will not drag me away from Emacs, but having more options is always a good thing.The only downside of it is that it automatically installs R from the...

## Rstudio

February 28, 2011
By

Rstudio, an open source cross-platform IDE for R, seems to be really attractive. It probably will not drag me away from Emacs, but having more options is always a good thing.The only downside of it is that it automatically installs R from the...

## RStudio – another integrated development environment for R

February 28, 2011
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If you’re in the market for a very easy-to-setup integrated development environment for R, wander over to RStudio.org. They’ve just released a beta version of their freely-available front end for R that runs under Windows, Linux and Mac OS ...

## Release of XLConnect 0.1-3

February 28, 2011
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Mirai Solutions GmbH (http://www.mirai-solutions.com) is proud to announce the first release of XLConnect, a comprehensive and cross-platform R package for manipulating Microsoft Excel files from within R. XLConnect differs from other related R packages in that it is completely cross-platform … Continue reading →

## 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)....

## RStudio: New free IDE for R

February 28, 2011
By

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)....

## Running a Regression in R

February 28, 2011
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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!

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

February 28, 2011
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(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...

## RStudio, new open-source IDE for R

February 28, 2011
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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

## RStudio, new open-source IDE for R

February 28, 2011
By

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

## Example 8.28: should we buy snowstorm insurance?

February 28, 2011
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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 ...

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

February 28, 2011
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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...

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

February 28, 2011
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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...

## Visualizing Soccer League Standings

February 27, 2011
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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

February 27, 2011
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We started the RStudio project because we were excited and inspired by R. The creators of R provided a flexible and powerful foundation for statistical computing; then made it free and open so that it could be improved collaboratively and its benefits could be shared by the widest possible audience. It’s better for everyone if the

## Welcome to our Weblog

February 27, 2011
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Welcome to the RStudio weblog! We’ll use the weblog to talk about both the product and its features as well as broader issues that concern the R community.

## John Chambers, the inventor of S, added reference classes to R…

February 26, 2011
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John Chambers, the inventor of S, added reference classes to R 2.12, and oh boy are they fun to look at! What you see in the picture above is a “Hello World” web application for R. It’s written using the Rack R package (not unlike Ruby’s Rac...

## More Chicago Mayoral Analaysis

February 26, 2011
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I perform a precincts-votes analysis on the returns from the Chicago Democratic Mayoral primary of 2011.

## The split-apply-combine paradigm in R

February 25, 2011
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Last night at the DC R Users meetup, which was our largest meetup to date, I gave an introductory presentation on data munging, and spent a bit of time on the split-apply-combine paradigm that I use almost daily in my work. I talked mainly about the packages plyr and doBy, which I use a lot

## ggplot2 joy

February 25, 2011
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I’ve been working on a long-term (25+yr) longitudinal study of rheumatoid arthritis with my boss. He just walked in and asked if I could create a plot showing the trajectory of pain scores over time for each subject, separated by educational level (4 groups). Having now worked with ggplot2 for a while, and learning more