Monthly Archives: March 2013

i Before e Except After c

March 26, 2013
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i Before e Except After c

When I went to school we were always taught the “i before e, except after c” rule for spelling. But how accurate is this rule? Kevin Marks tweeted today the following: »@uberfacts: There are 923 words in the English language that break the “I before E” rule. Only 44 words actually follow that rule.« Science— Kevin Marks (@kevinmarks)

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Python vs R vs SPSS … Can’t All Programmers Just Get Along?

March 26, 2013
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Python vs R vs SPSS … Can’t All Programmers Just Get Along?

Programmers have long been very proud and loyal with their tools, and often very vocal. This has led to well-contested rivalries and "fights" about which tool is better: emacs or vi; Java or C++; Perl or Python; Django or Rails; and, for data geeks, the SAS/SPSS/R/Matlab fight. The truth is, very few of us data geeks (data scientists, data analysts, statisticians, or...

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A Contest of the Flyer Variety

March 25, 2013
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A Contest of the Flyer Variety

Guess what?! Charlie decided to institute another round of the epic Flyer Contest! Here’s how it works in 5 easy steps… Print out one of the two flyers below (or this link: here) Post it somewhere public. Examples include: a message board in your department, at your local comic shop, on your mom’s fridge, or

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Significant P-Values and Overlapping Confidence Intervals

March 25, 2013
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Significant P-Values and Overlapping Confidence Intervals

There are all sorts of problems with p-values and confidence intervals and I have no intention (or the time) to cover all those problems right now.  However, a big problem is that most people have no idea what p-values really mean. Here is one example of a common problem with p-values and how it relates

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R – Defining Your Own Color schemes for HeatMaps

March 25, 2013
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R – Defining Your Own Color schemes for HeatMaps

This post is intended at those who are beginners at R, and is inspired by a small post in Martin's bioblog.First, we plot a "correlation heatmap" using the same logic that Martin uses. In our example, let's use the Movies dataset that comes with ggplot...

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Computing Maritime Routes in R

March 25, 2013
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Computing Maritime Routes in R

Thanks to the attention my paper on the cost of Somali piracy has received, a lot of people have approached me to ask how I computed the maritime routes. It is not a very difficult task using R. The key ingredient is a map of the world, that can be rasterized into a grid; all

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Massive online data stream mining with R

Massive online data stream mining with R

A few weeks ago, the stream package has been released on CRAN. It allows to do real time analytics on data streams. This can be very usefull if you are working with large datasets which are already hard to put in RAM completely, let alone to build some statistical model on it without getting into RAM problems. Most of...

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Ordinal data with JAGS

March 25, 2013
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Last week is had a look at the standard R routines for estimating models for ordinal data. This week, I want to have a look at JAGS for examining the same data. To be honest, most of it is taking an example (inhaler) and removing code. To my surpr...

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Podcast #6: Data Analysis MOOC Post-mortem

March 25, 2013
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Jeff and I talk about Jeff's recently completed MOOC on Data Analysis.

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Revolution Newsletter: March 2013

March 25, 2013
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The most recent edition of the Revolution Newsletter is out. The news section is below, and you can read the full March edition (with highlights from this blog and community events) online. You can subscribe to the Revolution Newsletter to get it monthly via email. Get Results Fast with our Quick Start Programs: Need help getting value from predictive...

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