What’s the difference between using which() and match() in R? For me - about 10 hours! Today I was doing some string matching in R. In my experience performing any sort of regex or string manipulation in R is a mistake....
Blog Archives
Data Science Undefined
One of the favorite bar room discussions of statisticians, machine learners, and computer scientists is – what is data science? (And I don’t care whether it happens in a bar or not, it’s a “bar room” discussion by virtue of...
How I Learned to Stop Worrying and Love Twitter
In honor of Twitter making the decision to come to Detroit, here’s a special post on how I became a Twitter user. … At 3:30pm my wife called me. There was a shooting where my brother-in-law works at UPMC Western...
Radical Education Reform? Think Bigger.
“My job is to teach you how to think.” –Hugh Young A few days ago John Naughton published an article summarizing his manifesto on how to reform computer science education. I agree computer science education is in need of drastic...
Missing Data Club
Welcome to Missing Data Club. There are only three rules. Rule #1 is: There is no missing data. Rule #2 is: THERE IS NO MISSING DATA! Rule #3: If you’ve never built a model using missing data – you must do it...
A Crash Course in git for Data Scientists
I really like git. It’s the first versioning tool I’ve ever used so I have nothing else to compare it to, but in the world of statistical model building where iteration is constant (and almost never a strict linear progression)...
github with Multiple Accounts: An Analyst Perspective
After using github for data mining competitions and a project on statistical language models I found I enjoyed it some much I wanted to use it at work too. The trick is there’s a lot of overlap between what I...
R Meets Java: An Absolute Beginners’ Introduction
My guess is R is most commonly integrated with C/C++ to handle heavy-duty computing. (thanks in no small part due to the productivity of Dick Eddlebuttle!) That said, if you’re like most statisticians and physical scientists and aren’t already a programming...
Get ROAuth to work on Windows 7
Jeff Gentry has created a couple of really fun and handy R packages for working with Twitter data called twitteR and ROAuth. He’s also written an easy to read vignette on how to get started. As of right now (March...
Thoughts on SPSS and R Integration
As part of considering SPSS as a platform for modeling I wanted to test SPSS’ integration with R. What I found out is getting SPSS to work with R isn’t embarssingly obvious. What’s worse I found it quite difficult to...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
