One of the search terms that bring people frequently to my site is “install ESS on Mac OS X” or something like that. As it turns out installing ESS on OS X is really easy, but Google search does not really bring up good instructions. There are at least two easy options: Use Aquamacs, it
Monthly Archives: November 2009
Export Trade Clusters
This post, as with the prior ones on trade clusters, aims to help visualize patterns of trade in the OECD from 50 years of partner trade statistics. The data is rich, meaning we should be able to develop rich intuition by exploring it visually. These slides follow the method laid out in Jong-Eun Lee, “Two 
Loading Big (ish) Data into R
So for the rest of this conversation big data == 2 Gigs. Done. Don’t give me any of this ‘that’s not big, THIS is big’ shit. There now, on with the cool stuff: This week on twitter Vince Buffalo asked about loading a 2 gig comma separated file (csv) into R (OK, he asked about tab
ESS on Mac OS X
One of the search terms that bring people frequently to my site is "install ESS on Mac OS X" or something like that. As it turns out installing ESS on OS X is really easy, but Google search does not really bring up good instructions. There are at least two easy options:
- Use Aquamacs, it comes bundled with...
ESS on Mac OS X
One of the search terms that bring people frequently to my site is "install ESS on Mac OS X" or something like that. As it turns out installing ESS on OS X is really easy, but Google search does not really bring up good instructions. There are at least two easy options:
- Use Aquamacs, it comes bundled with...
NYT: SAS threatened by R
The New York Times had an interesting piece yesterday about how SAS is facing several business threats from companies like the recently IBM-acquired SPSS, and from burgeoning interest in open-source software like R. The NYT ran an entire article about R earlier this year, and this article discusses how SAS has been revamping their technology to work seamlessly with...
RQuantlib
Quantlib is a free library for modeling, trading, and risk management in real-life providing a comprehensive software framework for quantitative finance, it is written in C++, which might be inconvenient for some users. JQuantLib aiming at Java-fans i...
Memory Management in R: A Few Tips and Tricks
This post discusses a few strategies that I have used to to manage memory in R.Stack Overflow TipsStack Overflow has a thread on Memory Management Tricks. I tend to follow these suggestions:.ls.objects(): There's a nice function (.ls.objects...
Type II Error
In hypothesis testing, a type II error is due to a failure of rejecting
an invalid null hypothesis. The probability of avoiding a type II error is
called the power of the hypothesis test, and is denoted by the quantity
1 - β .
Type II Error
In hypothesis testing, a type II error is due to a failure of rejecting
an invalid null hypothesis. The probability of avoiding a type II error is
called the power of the hypothesis test, and is denoted by the quantity
1 - β .
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
