by Derek McCrae Norton, Senior Sales Engineer In this third installment (following part 1 and part 2) of Extending RevoScaleR for Mining Big Data we look at how to use the building blocks provided by RevoScaleR to create a Naive Bayes model. Motivation: Fit a Naive Bayes model to big data. Naive Bayes is a simple probabilistic classifier based...
2273 search results for "git"
Improved R Profiling Summaries
In my last post I mentioned that I had improved on R’s summaryRprof() function with a custom function called proftable(). I’ve updated proftable() to take advantage of R 3.0.0’s ability to record line numbers while profiling. I’ve put it on github – you can get it there or below.
proftable reads in a file generated by...
Changing The Presidential Election with R in the Browser
After I finished with the tutorial post d3 <- R with rCharts and slidify and then saw R creates d3/javascript charts in Ipython Style Notebook, a light clicked. I could finally answer the lingering question I have had ever since I saw the NYT ...
Do Torontonians Want a New Casino? Survey Analysis Part 1
Toronto City Council is in the midst of a very lengthy process of considering whether or not to allow the OLG to build of a new casino in Toronto, and where. The process started in November of 2012, and set … Continue reading →
Cut Dates Into Quarters
Frequently I need to recode a date column to quarters. For example, at Excelsior College we have continuous enrollment so we report new enrollments per quarter. To complicate things a bit, our fiscal year starts in July so that July, August, and September represent the first quarter, January, February, and March are actually the third quarter. But sometimes...
R creates d3/javascript charts in Ipython Style Notebook
I am not sure I have ever done a post like this, but I was so blown away I had to do this post simply to embed this amazing Youtube video from the author of the R packages rCharts and slidify. Watch this screencast as he creates d3/raphael charts...
A Crash Course in R
This code has been kindly contributed by Robin Edwards
A pathological glm() problem that doesn’t issue a warning
I know I have already written a lot about technicalities in logistic regression (see for example: How robust is logistic regression? and Newton-Raphson can compute an average). But I just ran into a simple case where R‘s glm() implementation of logistic regression seems to fail without issuing a warning message. Yes the data is a
Le Monde puzzle [#818]
The current puzzle is as follows: Define the symmetric of an integer as the integer obtained by inverting the order of its digits, eg 4321 is the symmetric of 1234. What are the numbers for which the square is equal to the symmetric of the square of the symmetric? I first consulted stackexchange to find 
What the BBC isn’t telling you
Yesterday Gareth pointed me to this article on the BBC website. The underlying story has to do with Meredith Kercher's murder and the subsequent trial involving mainly her flat-mate Amanda Knox, in Perugia (Italy). As often in these grue...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
