Articles by JD Long

Real-World, Real-Time Analytics

February 17, 2010 | JD Long

Stop wasting time reading my drivel. You need to head over the the blog and read Peter Skomoroch’s interview with Bradford Cross of FlightCaster. Peter wrote up this interview back in August 2009, so I’m a little late to this party. There’s some really great quotes ... [Read more...]

Struggling with apply() in R

December 11, 2009 | JD Long

It’s common knowledge that I struggle wrapping my head around the apply functions in R. That is illustrated very clearly in the following discussion on Stack Overflow: Dirk’s comment is actually spot on. I’ve asked the same damn question at least 4-5 times. Only I didn’t ... [Read more...]

Loading Big (ish) Data into R

November 24, 2009 | JD Long

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 (... [Read more...]

Kicking Ass with plyr

October 29, 2009 | JD Long

Tonight (October 29, 2009) at 5:30 PM is the Chicago R meetup at Jaks tap. Here’s more info.  I’ll be making a presentation based on my earlier blog post about plyr. The presentation will only be 8 minutes long so I’ve had to pick and choose my info carefully. OK, who ... [Read more...]

A Fast Intro to PLYR for R

August 27, 2009 | JD Long

I’m not dead yet! Although it has been rumored that I am. The new job is going great and I’m thrilled to be with a new firm doing interesting work alongside smart people. It makes me seem smarter by simple association. There’s been a lot going on ...
[Read more...]

Not Just Normal… Gaussian

June 16, 2009 | JD Long

Dave, over at The Revolutions Blog, posted about the big ‘ol list of graphs created with R that are over at Wikimedia Commons. As I was scrolling through the list I recognized the standard normal distribution from the Wikipedia article on the same topic. Below is the fairly simple source ...
[Read more...]

Twitter from R… Sure, why not!

June 4, 2009 | JD Long

So I have started following the #RStats tag in twitter. Prior to a week ago I had never Twitterbated so I thought I would give it a go since I am not one to shy away from new technology… much. I think of Twitter like a call in radio show ...
[Read more...]

Choosing an SQL Engine for Analytics

March 9, 2009 | JD Long

I’ve been struggling for a while on which database to use for my working data. I used to use MS Access quite a lot. The problems with MS Access include but are not limited to: 2 GB file size limit, at least historically Versions change with each edition of MS ...
[Read more...]

R in The Windy City

February 27, 2009 | JD Long

In honor of me moving to Chicago, the powers who abide have decided to hold the first annual “R/Finance conference for applied finance using R” conference in Chicago this year. The dates are April 24-25, 2009. R/Finance 2009: Applied Finance with R To those who made the decision on location, ... [Read more...]

Data Analysis Workflow… Part 1 of Infinity

February 26, 2009 | JD Long

One of the many things that I sit around pondering when I should be doing productive things is the idea of analytical workflow. I have only worked with one analytical guru who I felt really gave thought and structure to workflow and its impact on analyist productivity. When I talk ... [Read more...]
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