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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 methods.In the second part of the manuscript we present ... [Read more...]

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 ... [Read more...]

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 ... [Read more...]

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... [Read more...]

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 ... [Read more...]

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 ... [Read more...]

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... [Read more...]

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 ... [Read more...]

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... [Read more...]

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... [Read more...]

IntroductionIn this post I am going to show how to extract data from web pages in table format, transform these data into spatial objects in R and then plot them in maps.ProcedureFor this project we need the following two packages: XML and raster.The first package is used to ... [Read more...]

A couple of years ago I wrote a post about using Shiny to exchange data between the Google Maps API and R: http://r-video-tutorial.blogspot.ch/2013/07/interfacing-r-and-google-maps.htmlBack then as far as I remember Shiny did not allow a direct exchange of data between javascript, therefore I had to improvise ... [Read more...]

This guide is more for self reference than anything else.  Since I struggled for two days trying to find all the correct setting to complete this task, gathering information from several websites, I decided to write a little guide on this blog so ... [Read more...]

These days I was working with a Shiny app for which the computation time is a big problem.Basically this app takes some coordinates, extract values from 1036 rasters for these coordinates and make some computations.  As far as I can (and please correct me if I'm wrong!) tell there are ... [Read more...]