Blog Archives

Learning R for Data Visualization [Video]

April 25, 2016
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Learning R for Data Visualization [Video]

Last year Packt asked me to develop a video course to teach various techniques of data visualization in R. Since I love the idea of video courses and tutorials, and I also enjoy plotting data, I readily agreed.The result is this course, published last ...

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Wind Resource Assessment

December 31, 2015
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This is an article we recently published on "Renewable and Sustainable Energy Reviews". It starts with a thorough review of the methods used for wind resource assessment: from algorithms based on physical laws to other based on statistics, plus mixed m...

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Spatio-Temporal Kriging in R

August 27, 2015
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Spatio-Temporal Kriging in R

PrefaceI am writing this post more for reminding to myself some theoretical background and the steps needed to perform spatio-temporal kriging in gstat. This month I had some free time to spend on small projects not specifically related to my primary occupation. I decided to spend some time trying to learn this technique since it may become useful in...

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Organize a walk around London with R

June 21, 2015
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Organize a walk around London with R

The subtitle of this post can be "How to plot multiple elements on interactive web maps in R".In this experiment I will show how to include multiple elements in interactive maps created using both plotGoogleMaps and leafletR. To complete the work prese...

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Cluster analysis on earthquake data from USGS

June 1, 2015
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Cluster analysis on earthquake data from USGS

Theoretical BackgroundIn some cases we would like to classify the events we have in our dataset based on their spatial location or on some other data. As an example we can return to the epidemiological scenario in which we want to determine if the spread of a certain disease is affected by the presence of a particular source of...

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Live Earthquake Map with Shiny and Google Map API

May 27, 2015
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Live Earthquake Map with Shiny and Google Map API

In the post Exchange data between R and the Google Maps API using Shiny I presented a very simple way to allow communication between R and javascript using shiny.This is an example of a practical approach for which that same system can be used to create a useful tool to visualize seismic events collected from USGS in...

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Interactive maps of Crime data in Greater London

May 25, 2015
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Interactive maps of Crime data in Greater London

In the previous post we looked at ways to perform some introductory point pattern analysis of open data downloaded from Police.uk. As you remember we subset the dataset of crimes in the Greater London area, extracting only the drug related ones. Subseq...

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Introductory Point Pattern Analysis of Open Crime Data in London

May 21, 2015
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Introductory Point Pattern Analysis of Open Crime Data in London

IntroductionPolice in Britain (http://data.police.uk/) not only register every single crime they encounter, and include coordinates, but also distribute their data free on the web.They have two ways of distributing data: the first is through an API, which is extremely easy to use but returns only a limited number of crimes for each request, the second is...

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Introductory Time-Series analysis of US Environmental Protection Agency (EPA) pollution data

May 18, 2015
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Introductory Time-Series analysis of US Environmental Protection Agency (EPA) pollution data

Download EPA air pollution data The US Environmental Protection Agency (EPA) provides tons of free data about air pollution and other weather measurements through their website. An overview of their offer is available here: http://www.epa.gov/airdata/T...

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Interactive maps for the web in R

May 15, 2015
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Interactive maps for the web in R

Static MapsIn the last post I showed how to download economic data from the World Bank's website and create choropleth maps in R (Global Economic Maps).In this post I want to focus more on how to visualize those maps.Sp PackageProbably the simplest way...

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