Space Needle

PyData Seattle 2015 – Simulation, PySpark and Deep Learning Tutorials

One month ago, I got an email from a colleague: The subject of his email was a single word: PyData The email had a single EventBrite.com URL. Intrigued, I clicked… and that’s when my adventure into PyData began. In this post, …

Gadget Graph

What is an exchangeability martingale?

Exchangeability martingales can be used to find strange or odd data points. The mechanics of exchangeability martingales is still a bit of a mystery to me. However, posted below are the basic components and how each step gets us to …

Broken Chain

Broken link checker analysis with R

You’ve found a few broken links on your blog or web site, and now you wonder whether there are more. Here’s a quick way to get a sense of how big the problem is. You could basically take 2 different …

teamwork

R set working directory using copy and paste

After using Windows Explorer to navigate to a directory, I just want to copy and paste the directory in R, but I get this error: I used the setwd() function and pasted the directory, but there is an answer! By …

overflow

SQL stress test: Simulate full database

Simulating a full database is a beautiful stress test, but how the heck can this be done quickly with SQL Server? A full database is likely never encountered during development and probably completely forgotten during testing (it was in our …