August 2013

Groan – my first R package

August 20, 2013 | Lee Pang

Being one of two R experts at my current job I figured I should be familiar with package development. Frankly, I've been procrastinating on this topic since I started using R in 2007 - I was doing just fine with source() and the section of the R manua... [Read more...]

The financial meltdown, to a trance beat

August 20, 2013 | David Smith

With the FMS Symphony by csv soundsystem you can listen to the Global Financial Crisis as you watch interest rates plunge while the Treasury floods the market with emergency funds. The source data for the chart and music comes from daily emails (like this one) sent by the US Treasury ... [Read more...]

Downloading and Analyzing CD1025’s Playlist

August 20, 2013 | Andrew Landgraf

CD1025 is an “alternative” radio station here in Columbus. They are one of the few remaining radio stations that are independently owned and they take great pride in it. For data nerds like me, they also put a real time list of recently played songs on their website. The page ... [Read more...]

Time-series forecasting: Bike Accidents

August 20, 2013 | Corey Chivers

About a year ago I posted this video visualization of all the reported accidents involving bicycles in Montreal between 2006 and 2010. In the process I also calculated and plotted the accident rate using a monthly moving average. The results followed a pattern that was for the most part to be expected. ... [Read more...]

“[” and “[[” with the apply() functions

August 20, 2013 | Karl Broman

Did you know you can use "[" and "[[" as function names for subsetting with calls to the apply-type functions? For example, suppose you have a bunch of identifier strings like "ZYY-43S-CWA3" and you want to pull off the bit before the first hyphen ("ZYY" in this case). (For code to ... [Read more...]

Electronic lab notebook

August 20, 2013 | Karl Broman

I was interested to read C. Titus Brown‘s recent post, “Is version control an electronic lab notebook?” I think version control is really important, and I think all computational scientists should have something equivalent to a lab notebook. But I think of version control as serving needs orthogonal to ... [Read more...]

Print glm-output to HTML table #rstats

August 20, 2013 | Daniel

We often use logistic regression models in our analyses and we also often need to publish the results in table format. And, we always use MS Word since this is our standard office in our department. So I thought about … Weiterlesen → [Read more...]

Weak Learners

August 20, 2013 | David

Tonight's session of R bore just enough fruit that I finally am writing my sophomore entry. I was browsing the slides from a machine learning lecture given by Leo Breiman and came across a relatively simple example he used to introduce the notions... [Read more...]

Sentiment Analysis using R

August 20, 2013 | suresh kumar Gorakala

September 23, 2013Movie rating using Twitter Data – Using RToday I will explain you how to create a basic Movie review engine based on the tweets by people using R.The implementation of the Review Engine will be as follows:         Gets Tweets from Twitter         Clean the data         Create a Word Cloud         Create ... [Read more...]

Revolution Newsletter: August 2013

August 19, 2013 | David Smith

The most recent edition of the Revolution Newsletter is now available. In case you missed it, the news section is below, and you can read the full August edition (with highlights from this blog and community events) online. You can subscribe to the Revolution Newsletter to get it monthly via ... [Read more...]
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