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Four years of the Revolutions Blog

December 10, 2012
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Yesterday was the fourth anniversary of the Revolutions blog. Our first post was way back on December 9, 2008, and in the four years since we've been regularly posting about R, open source, statistics, big data, data science and other random things that happened to catch our eye. In fact, there have been 1488 posts published in the last...

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Visualizing Baltimore 3: Crime and Vacant Properties, Neighborhood Level

December 10, 2012
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Visualizing Baltimore 3: Crime and Vacant Properties, Neighborhood Level

A few quick plots of West Baltimore neighborhoods, first Sandtown-Winchester: and Harlem Park: These aren’t very polished, I’ll put up better versions. Here’s the code for those that want it: ## gis libraries library(spBayes) library(MBA) library(geoR) library(fields) library(sp) library(maptools) library(rgdal)...

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Visualizing Baltimore 2: Vacant Property and Some More Crime

December 10, 2012
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Visualizing Baltimore 2: Vacant Property and Some More Crime

One of the key predictors in my model for this crime project I’m working on is vacant houses and lots. I’ll speak to some findings about the relationship between levels of the different types of crime and vacant property in...

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Shiny apps are awesome

December 10, 2012
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Shiny apps are awesome

RStudio has a new product called Shiny that, quoting from their website, "makes it super simple for R users like you to turn analyses into interactive web applications that anyone can use". See here for more information. A Shiny basically consists of two files: a ui.r file and a server.r file. The ui.r file, as it says, provides...

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Shiny apps are awesome

December 10, 2012
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Shiny apps are awesome

RStudio has a new product called Shiny that, quoting from their website, "makes it super simple for R users like you to turn analyses into interactive web applications that anyone can use". See here for more information. A Shiny basically consists of two files: a ui.r file and a server.r file. The ui.r file, as it says, provides...

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Please stop using Excel-like formats to exchange data

December 7, 2012
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Please stop using Excel-like formats to exchange data

I know “officially” data scientists all always work in “big data” environments with data in a remote database, streaming store or key-value system. But in day to day work Excel files and Excel export files get used a lot and cause a disproportionate amount of pain. I would like to make a plea to my Related posts:

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UEFA Champions League Knockout Phase Draws: Monte Carlo Simulation with R

December 7, 2012
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Draws for the knockout phase of the 2012–13 UEFA Champions League will be held in Nyon on the 20th December 2012. The rules of the draw are simple and are as follows:8 Group winner teams will be seeded.8 Group runner-up teams will be unseeded.Teams coming from the same group and from same association...

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Visualizing Baltimore with R and ggplot2: Crime Data

December 7, 2012
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Visualizing Baltimore with R and ggplot2: Crime Data

The advent of municipal open data initiatives has been both a blessing and curse for my particular brand of data nerd. On one hand, it has opened up the possibility of developing deep and useful knowledge about the places we...

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How to spend an inordinate amount of time becoming efficient

December 6, 2012
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How to spend an inordinate amount of time becoming efficient

I’ve spent a good deal of 2012 constructing a data warehouse to manage all the various data elements that my company has. Although we’re a small enterprise, the richness and complexity of the information is rather high. Moreover, as a data-driven organization, there’s a strong impetus to construct meaningful analysis with every bit of input

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R in the Cloud

December 6, 2012
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R in the Cloud

I've been having some great fun parallelizing R code on Amazon's cloud. Now that things are chugging away nicely, it's time to document my foibles so I can remember not to fall into the same pits of despair again. The goal was to perform lots of trails of a randomized statistical simulation. The jobs were independent and fairly chunky, taking...

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