Monthly Archives: March 2013

April 18, 2013Third Milano R net meeting: agenda

March 25, 2013
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April 18, 2013Third Milano R net meeting: agenda

April 18, 2013 - 18:00 - 21:00 Fiori Oscuri Bistrot & Bar (www.fiorioscuri.it) Via Fiori Oscuri, 3 - Milano (Zona Brera) 18.00 - 18.15 Registration 18.15 - 18.30 Welcome presentation Andrea Spanò, Partner at Quantide 18.30 - 19.00 Digit recognition Machine … Continue reading →

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Submit a talk for the first R in Insurance conference

March 25, 2013
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Submit a talk for the first R in Insurance conference

The registration for the first R in Insurance is open and there is still time to submit a talk / lightning talk.The conference will take place at Cass Business School in London on Monday, 15 July 2013. This is the Monday following the useR! 2013 confer...

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Does It Make Sense to Segment Using Individual Estimates from a Hierarchical Bayes Choice Model?

March 24, 2013
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Does It Make Sense to Segment Using Individual Estimates from a Hierarchical Bayes Choice Model?

I raise this question because we see calls for running segmentation with individual estimates from hierarchical Bayes choice models without any mention of the possible complications that might accompany such an approach.  Actually, all the calls seem to be from those using MaxDiff to analyze the data from incomplete block designs.  For example, if one were to...

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Writing a MS-Word document using R (with as little overhead as possible)

March 24, 2013
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Writing a MS-Word document using R (with as little overhead as possible)

The problem: producing a Word (.docx) file of a statistical report created in R, with as little overhead as possible. The solution: combining R+knitr+rmarkdown+pander+pandoc (it is easier than it is spelled). If you get what this post is about, just …Read more »

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Using R: reading tables that need a little cleaning

March 24, 2013
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Using R: reading tables that need a little cleaning

Sometimes one needs to read tables that are a bit messy, so that read.table doesn’t immediately recognize the content as numerical. Maybe some weird characters are sprinkled in the table (ever been given a table with significance stars in otherwise numerical columns?). Some search and replace is needed. You can do this by hand, and

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R Help tooltips

March 24, 2013
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R Help tooltips

I created a simple jquery plugin to display some information when hovering links to r documentation files hosted at help.r-enthusiasts.com Below is a snapshot from highlight.r-enthusiasts.com that uses the tooltips: See also a live example here: data.frame Using this feature … Continue reading →

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Tupper’s self-referential formula

March 24, 2013
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Tupper’s self-referential formula

Can't remember where I first came across this equation but the Tupper's self referential equation, is a very interesting formula that when graphed in two dimension plane it reproduces the formula. \[ \frac{1}{2} I first thought this would be...

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Not all proportion data are binomial outcomes

March 24, 2013
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Not all proportion data are binomial outcomes

It really is trivial. Not every proportion is frequency. There are things that have values  bounded between 0 and 1 and yet they are neither probabilities, nor frequencies. Why do I even bother to write this? Because some kinds of…Read more →

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Rcpp 0.10.3

March 24, 2013
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Rcpp 0.10.3 is on CRAN. Here is the part of the NEWS file related to this release Changes in R code Prevent build failures on Windowsn when Rcpp is installed in a library path with spaces (transform paths in the … Continue reading →

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Moving

March 24, 2013
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Moving

This blog is moving to blog.r-enthusiasts.com. The new one is powered by wordpress and gets a subdomain of r-enthusiasts.com. See you there

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