After having a look to this video: http://www.screenr.com/UxH8 from rtwotutorials, and reading some tutorials, I decided to modified the script from the previous post: Practicing Script with “ R”: Monitor , in order to make it more r...
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reshape (from base) Explained: Part II
Part II Explains More Complex Wide to Long With base reshape In part I of this base reshape tutorial we went over the basics of reshaping data with reshape. We learned two rules that help us to be more efficient … Continue reading →
French Global Factors
I have said it already in multiple posts, but Kenneth French’s data library is one of the most generous and powerful contributions to the financial community. To build on Systematic Investor’s series on factors, I thought I should run some ba...
microbenchmarking with R
I love to benchmark. Maybe I’m a bit weird but I love to bench everything in R. Recently I’ve had people raise accuracy challenges to the typical system.time and rbenchmark package approaches to benchmarking. I saw Hadley Wickham promoting the … Continue reading →
Live Longer – Choose Your Country Wisely (if you can)
Full democracy countries are the ones in which to live. This week's story could start and end with the above graph with almost no further explanation. But that wouldn't do it justice. So, like so many of the past articles on "Graph o...
Short versus long papers, in academic journals
This Monday, during my talk on quantile regressions (at the Montreal R-meeting), we've seen how those nice graphs could be interpreted, with the evolution of the slope of the linear regression, as a function of the probability level. One illustrati...
PostgreSQL, Excel, R, and a Really Big Data Set!
At work I’ve started to work with the biggest data set I’ve ever seen! First, let me qualify my use of the term “Big Data”. The number of rows in the resultant data set (after much transformation and manipulation in … Continue reading →
Small Countries Stablize by Exporting High-Tech
Smaller countries lead the way. When you think of 'high-tech', which countries come to mind? What is 'High-Tech'? Before continuing, what is meant by the term 'high-tech'? As defined by the World Data Bank, high-technology exports ar...
Montreal R Workshop: Quantile Regression
Stewart Biology Building, McGill University (Rm N4/17) Monday, April 24, 2012 14h-16h Dr. Arthur Charpentier (UQàM) In this workshop we will examine difference concepts related to quantiles, and practical issues based on R codes. This workshop will present quantile regression, and the idea of iterative least square estimation. It will present an illustration on climate 
Enjoy Low Income Tax Rates
Tax rates were higher in the past... Joe derisively snorted at the pay stub in his hand. Crumpling it into a ball, he wound up like a baseball pitcher and fast-balled the wad of paper across the room. It bounced unsatisfyi...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
