Publications by Tal Galili
Web Development with R – an HD video tutorial of Jeroen Ooms talk
Here is a HD version of a video tutorial on web development with R, a lecture that was given by Jeroen Ooms (the guy who made A web application for R’s ggplot2). This talk was given at the Bay Area UseR Group meeting on R-Powered Web Apps. You can also view the slides for his talk and view (great) examples for: stockplot, lme4, and gpplot...
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Barnard’s exact test – a powerful alternative for Fisher’s exact test (implemented in R)
(The R code for Barnard’s exact test is at the end of the article, and you could also just download it from here) About Barnard’s exact test About half a year ago, I was studying various statistical methods to employ on contingency tables. I came across a promising method for 2×2 contingency tables called “Barnard’s exact test“. Bar...
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Highlight the R syntax on your (WordPress) blog using the wp-syntax plugin
Download link for WP-Syntax plugin (with GeSHi version 1.0.8.6) In case you have a self hosted WordPress blog, and you wish to show your R code in it, how would you do it? The simplest solution would be to just paste the code as plain text, which will look like this: x plot(x, xlab = “index”, main = “Example code”) But if you would like...
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R Web Application – “Hello World” using RApache (~7min video tutorial)
I just noticed a google buzz from Jeroen ooms, with a Youtube video titled “RApache Hello World + POST arguments + catching errors.” In this ~7 min video tutorial, Jeroen shares with us: How to write ”Hello World” in a website using RApache. How to extract arguments from a form submited by the website visitor (and then inserting it into...
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For fun: Correlation of US State with the number of clicks on online banners
“Chitika research” published today a fun small dataset (you can download it from here) in a post titled “The Educated are Harder to Advertise To”. In this post I had three goals in mind: Suggesting another plot instead of the one used in the original post. Emphasizing the “Correlation does not imply causation” rule. Inviting other R ...
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Post hoc analysis for Friedman’s Test (R code)
My goal in this post is to give an overview of Friedman’s Test and then offer R code to perform post hoc analysis on Friedman’s Test results. (The R function can be downloaded from here) Preface: What is Friedman’s Test Friedman test is a non-parametric randomized block analysis of variance. Which is to say it is a non-parametric version o...
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Siegel-Tukey: a Non-parametric test for equality in variability (R code)
Daniel Malter just shared on the R mailing list (link to the thread) his code for performing the Siegel-Tukey (Nonparametric) test for equality in variability. Excited about the find, I contacted Daniel asking if I could republish his code here, and he kindly replied “yes”. From here on I copy his note at full. The R function ...
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Nutritional supplements efficacy score – Graphing plots of current studies results (using R)
In this post I showcase a nice bar-plot and a balloon-plot listing recommended Nutritional supplements , according to how much evidence exists for thier benefits, scroll down to see it(and click here for the data behind it) * * * * The gorgeous blog “Information Is Beautiful” recently publish an eye candy post showing a “balloon race” ...
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R-bloggers (with ~50 blogs) has just crossed the 1000 subscribers mark!
I am very happy to discover so many of you readers are interested in the content that bloggers are posting about R. Over the past few months, 50 bloggers have come together in this place to share with all of us what they write about R. If you wish, you can see all of the articles they wrote in the “article list” page. If you wish to join R ...
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A nice link: “Some hints for the R beginner”
Patrick Burns just posted to the mailing list the following massage: There is now a document called “Some hints for the R beginner” whose purpose is to get people up and running with R as quickly as possible. Direct access to it is: http://www.burns-stat.com/pages/Tutor/hints_R_begin.html JRR Tolkien wrote a story (sans hobbits) called ‘Lea...
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