Posts Tagged ‘ applications ’

Visualizing the census

July 9, 2010
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Visualizing the census

Now that the 2010 survey is over, you might be wondering what we can learn from the data when the aggregated results are published. For a good guide to the kinds of questions you'll be able to answer, take a look at StatJump, where you can see tables and charts of the results of the 2000 census: population data...

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How to map your Twitter social network

May 26, 2010
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How to map your Twitter social network

Ever wondered which Twitterers you and a friend share? Using R and the twitteR package, there's an easy way to find out. Cornelius Puschmann hacked together some R code to do just that for the Humanities and Technology Camp and it seems to work pretty well. Just replace 'coffee001' with the your Twitter username, 'mypassword' with your Twitter password,...

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Saving the world with R

April 15, 2010
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Tuesday's meeting of the Bay Area R UseR Group at the LinkedIn offices was a great event. The headline speaker was Joe Adler, author of the excellent R reference manual, R in a Nutshell. Joe's presentation was an in-depth look at the relative speed of various options in R for looking up values from a key in a key-value...

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Predicting Pizza

March 26, 2010
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Predicting Pizza

What's the secret to the best pizza in New York? That's what statistical consultant and R user Jared Lander sought to find out, by analyzing the rankings of NY pizza joints at MenuPages.com, and building a regression model for ratings based on variables like localion, price, number of reviews, and pizza-oven type (gas, coal or wood)? Here's a scatterplot...

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Visualizing droughts with R

March 15, 2010
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Visualizing droughts with R

Physicist and weather scientist Joe Wheatley used R to design and create a useful visual representation of how drought affects a region over long time-scales. Instead of charting absolute rainfall (or lack thereof), he instead charts the Standardized Precipitation Index (SPI), where extreme values (above 2 or below -2) indicate extreme wetness or dryness compared to the usual precipitation...

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Steve Miller on R at Predictive Analytics World

February 26, 2010
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At the Information Management blog, Steve Miller has provided two great reviews (here and here) of last week's Predictive Analytics World conference, including a recap of the Bay Area User's Group meeting featuring John Chambers. (My personal highlight from John's talk? A photograph of the very first sketch of what was to become the S system, which ultimately begat...

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Mapping the Massachusetts election upset with R

January 25, 2010
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Mapping the Massachusetts election upset with R

The blog Offensive Politics has done some in-depth analysis of the recent Senate special-election upset in Massachusetts, comparing the results of victorious Republican candidate Scott Brown to those of the unsuccessful Republican Presidential candidate John McCain in 2008. It's pretty clear that Brown out-performed expectations with Democratic voters, but this chart of the change in Democratic voters from 2008...

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How to integrate R into web-based applications (video)

January 20, 2010
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The slides and videos from Jeff Horner's talk at last week's Bay Area User Group session on R-Powered Web Apps are now available. I've embedded it here below, but you might want to click through to larger size for better readability on the slides. Jeff's talk (titled "Use Rapache! It works") gives an overview of how to integrate R...

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Forecasting the weather with R

December 22, 2009
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Forecasting the weather with R

The US National Centers for Environment Prediction (NCEP) produces weather forecasts for the entire world from a model that's updated every 6 hours. The data is made freely available, and with a couple of free tools to convert the data and R you can easily produce am unpdated global weather forecast like this (click to enlarge): (Check out the...

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