Monthly Archives: March 2013

2013 World Universities Ranking

March 4, 2013
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2013 World Universities Ranking

The Times Higher Education (http://www.timeshighereducation.co.uk) released its World Reputation Ranking. The ranking employs survey consultation among invited-only academics to measure reputation among several universities. It is assumed to be the world’s largest opinion survey of this sort across the globe. Every year, a list of the top 100 most powerful university brands is released. Despite

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Tapping the FourSquare Trending Venues API with R

March 4, 2013
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Tapping the FourSquare Trending Venues API with R

I came up with the following function to tap into the FourSquare trending venues API: library("RCurl", "RJSONIO")   foursquare<-function(x,y,z){ w<-paste("https://api.foursquare.com/v2/venues/trending?ll=",x,"&radius=2000&oauth_token=",y,"&v=",z,sep="") u<-getURL(w) test<-fromJSON(u) locationname="" lat="" long="" zip="" herenowcount="" likes="" for(n in 1:length(test$response$venues)) { locationname = test$response$venues]$name lat = test$response$venues]$location$lat long = test$response$venues]$location$lng zip = test$response$venues]$location$postalCode herenowcount<-test$response$venues]$hereNow$count likes<-test$response$venues]$likes$count xb<-as.data.frame(cbind(locationname, lat, long, zip, herenowcount, likes)) } xb$pulled=date() return(xb)

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Track the bookies’ favourites for the next Pope

March 4, 2013
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Track the bookies’ favourites for the next Pope

Tired of manually running a python script to scrape the latest bookmaker odds on the next Pope, R user AJ (an analytical research manager at a large healthcare company) instead created an R script to track the odds on the Papal successor, and automated it with the Shiny package for R. The screenshot below shows the odds of each...

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Revolution Analytics News Roundup

March 4, 2013
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Between the Strata conference and various announcements, last week was certainly a busy one for the crew here at Revolution Analytics. So I thought I'd take the opportunity to catch you up on some of the recent media articles you might have missed: The Wall Street Journal interviewed our new VP of Services Neera Talbert on the trend towards...

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Great Infographic

March 4, 2013
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This is a really great exposition on an infographic. Note that the design elements and "chart junk" serve to better connect and communicate the data to the viewer. The choice not to go with pie charts for the first set of plots is a good one. The drawbacks of polar representations of proportions is very

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Pricing of a financial product : A pricer of a call option.

March 4, 2013
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Pricing of a financial product : A pricer of a call option.

The financial market is not only made of stock options. Other financial products enable market actors to target specific aims. For example, an oil buyer like a flight company may want to cover the risk of increase in the price of oil. In this case it i...

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What Happened Then? Using Approximated Twitter Follower Accession to Identify Political Events

March 4, 2013
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What Happened Then? Using Approximated Twitter Follower Accession to Identify Political Events

Following a chat with @andypryke, I thought I’d try out a simple bit of feature detection around approximated follower acquisition charts (e.g. Estimated Follower Accession Charts for Twitter) to see if I could detect dates around which there were spikes in follower acquisition. So for example, here’s the follower acquistion chart for Seem Malhotra: We

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Stan in L.A. this Wed 3:30pm

March 4, 2013
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Stan in L.A. this Wed 3:30pm

Michael Betancourt will be speaking at UCLA: The location for refreshment is in room 51-254 CHS at 3:00 PM. The place for the seminar is at CHS 33-105A at 3:30pm – 4:30pm, Wed 6 Mar. The post Stan...

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PyStan!

March 4, 2013
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Stan is written in C++ and can be run from the command line and from R. We’d like for Python users to be able to run Stan as well. If anyone is interested in doing this, please let us know and we’d be happy to work with you on it. Stan, like Python, is completely The post PyStan!...

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Shiny with PerformanceAnalytics Example

March 4, 2013
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Shiny with PerformanceAnalytics Example

The folks at Rstudio have done some amazing work with the shiny package. From the shiny homepage, “Shiny makes it super simple for R users like you to turn analyses into interactive web applications that anyone can use.” Developing web applications has always appealed to me, but hosting, learning javascript, html, etc. made me put … Continue reading...

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