329 search results for "boxplot"

reshape (from base) Explained: Part II

May 5, 2012
By
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 →

Read more »

French Global Factors

April 30, 2012
By
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...

Read more »

microbenchmarking with R

April 28, 2012
By
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 →

Read more »

Live Longer – Choose Your Country Wisely (if you can)

April 25, 2012
By
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...

Read more »

Short versus long papers, in academic journals

April 24, 2012
By
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...

Read more »

My bookshelf

April 22, 2012
By
My bookshelf

I'd like to start with something small, and simple. The thing about analyzing the data of your own life is that you are the only one doing the research, so you also have to collect all of the data yourself. This takes effort; and, if you'd like to build a large enough data set to do some really interesting...

Read more »

PostgreSQL, Excel, R, and a Really Big Data Set!

April 19, 2012
By
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 →

Read more »

Small Countries Stablize by Exporting High-Tech

April 18, 2012
By
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...

Read more »

Montreal R Workshop: Quantile Regression

April 17, 2012
By
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

Read more »

Enjoy Low Income Tax Rates

April 4, 2012
By
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...

Read more »