Monthly Archives: August 2012

2012 Summer Olympics: Home Court Advantage – How Will the Brits Perform?

August 9, 2012
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2012 Summer Olympics: Home Court Advantage – How Will the Brits Perform?

The Olympics are a big deal on a global scale. How big? Perhaps Paula Radcliffe (an English long distance runner) said it best: "I have achieved a lot and I'm grateful for that - I'm just a bit greedy because I want to add the Olympics. It's...

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How Many Data Scientists Are There?

August 9, 2012
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How Many Data Scientists Are There?

How Many Data Scientists Are There? I've seen a lot of articles lately about “Big Data” and the looming “talent gap.” This article from the Wall Street Journal is a good example. It cites a McKinsey estimate that states that we will need 1.5 million more managers and analysts who are conversant with “big data.” Of...

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How Many Data Scientists Are There?

August 9, 2012
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How Many Data Scientists Are There?

How Many Data Scientists Are There?I've seen a lot of articles lately about “Big Data” and the looming “talent gap.” This article from the Wall Street Journal is a good example. It cites a McKinsey estimate that states that we will need 1.5 million more managers and analysts who are conversant with “big data.” Of...

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Cheat sheet for prediction and classification models in R

August 9, 2012
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Cheat sheet for prediction and classification models in R

Ricky Ho has created a reference a 6-page PDF reference card on Big Data Machine Learning, with examples implemented in the R language. (A free registration to DZone Refcardz is required to download the PDF.) The examples cover: Predictive modeling overview (how to set up test and training sets in R) Linear regression (using lm) Logistic regression (using glm)...

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The Relative Importance of Predictors – Let the Games Begin!

August 9, 2012
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The Relative Importance of Predictors – Let the Games Begin!

What's the one thing we need to do?Marketing researchers are asked this question frequently whenever they analyze customer satisfaction data.  A company wishing to increase sales or limit churn wants to focus only on the most important determinants of those outcomes.   Given the limitations imposed by the available customer survey data, this strategic question is transformed quickly into a methodological one concerning how...

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Exploring distributions of Ensatina salamander subspecies using rvertnet by Neil Kelly

August 9, 2012
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Exploring distributions of Ensatina salamander subspecies using rvertnet by Neil Kelly

This week we have a guest blog post by Neil Kelley Last week, I stumbled on Vijay’s blog post demonstrating his new package rvertnet. Although I am a paleontologist, some of my research involves anatomical comparison between extinct species and extant relatives or ecological analogs, so I have some experience using VertNet to track down

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Exploring distributions of Ensatina salamander subspecies using rvertnet by Neil Kelly

August 9, 2012
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Exploring distributions of Ensatina salamander subspecies using rvertnet by Neil Kelly

This week we have a guest blog post by Neil Kelley Last week, I stumbled on Vijay’s blog post demonstrating his new package rvertnet. Although I am a paleontologist, some of my research involves anatomical comparison between extinct species and extant relatives or ecological analogs, so I have some experience using VertNet to track down

Read more »

How Many Data Scientists Are There?

August 9, 2012
By
How Many Data Scientists Are There?

How Many Data Scientists Are There? I've seen a lot of articles lately about “Big Data” and the looming “talent gap.” This article from the Wall Street Journal is a good example. It cites a McKinsey estimate that states that we will need 1.5 million more managers and analysts who are conversant with “big data.” Of course, some of...

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Interviews

August 9, 2012
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I’ve been interviewed twice in the last year: For DecisionStats, 9 August 2012. For Data Mining Research, 21 October 2011. Republished in Amstat News, 1 December 2011. Some readers of this blog might find them interesting. I said a few things in t...

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Show me yours and I’ll show you mine

August 9, 2012
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Show me yours and I’ll show you mine

I remember when I started with R, there was little processing power directed toward an IDE. I had enough problems with the syntax, loops and the like and R gui seemed adequate. When I started working on a heavy project, I had to knock it up a notch (bam!). After weeks of trial and error

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