R // Posts tagged as "R"
Great Maps with ggplot2
The above map (and this one) was produced using R and ggplot2 and serve to demonstrate just how sophisticated R visualisations can be. We are used to seeing similar maps produced with conventional GIS platforms or software such as Processing but I hadn’t yet seen one from the R community (feel free to suggest some ...
Coming of Age: R and Spatial Data Visualisation
I have been using R (a free statistics and graphics software package) now for the past four years or so and I have seen it become an increasingly powerful method of both analysing and visualising spatial data. Crucially, more and more people are writing accessible tutorials (see here) for beginners and intermediate users and the development ...
Global Migration Maps
Migrations of people have existed for millennia and occur at a range of scales and time-periods (from small-scale journeys to work through to intercontinental resettlement). As a geographer I have long been interested in these and thought it was about time I mapped them! Using data from the Global Migrant Origin Database (thanks Adam for the ...
Mapping London’s Population Change 1801-2030
Buried in the London Datastore are the population estimates for each of the London Boroughs between 2001 – 2030. They predict a declining population for most boroughs with the exception of a few to the east. I was surprised by this general decline and also the numbers involved- I expected larger changes from one year to ...
R interface to Google Chart Tools
.gif&w=556&h=133&zc=1)
Hans Rosling eat your heart out! It is now possible to interface R statistics software to Google’s Gapminder inspired Chart Tools. The plots below were produced using the googleVis R package and three datasets from the Gapminder website. The first shows the relationship between income, life expectancy and population for 20 countries with the highest ...
Boris Bikes/Barclays Cycle Hire Average Journey Times
The visualisation above shows the average relative duration of Boris Bikers’ weekday journeys over a 4 month period at hourly intervals. For each time step the average journey time (in seconds) from each docking station has been calculated.This information is interesting because it shows the preference for short journeys around the City of London, whilst ...
Exporting KML from R
Google Earth has become a popular way of disseminating spatial data. KML is the data format required to do this. It is possible to load almost any type of spatial data format into R and export it as a KML file. In my experience R seems much quicker at doing this than many well-known GIS ...
Installing rgdal on Mac OS X
******Roger Bivand has kindly just emailed me to say: “Your 2 November blog about rgdal on OSX is very misleading. The CRAN rgdal page: http://cran.r-project.org/web/packages/rgdal/index.html says all you need to know unless you need extra drivers, or already have PROJ.4 and GDAL installed. Just do: setRepositories(ind=1:2) install.packages(“rgdal”) installs rgdal with all its external dependencies satisfied. It is ...
Maps with ggplot2
The ggplot2 package offers powerful tools to plot data in R. The plots are designed to comply with the “grammar of graphics” philosophy and can be produced to a publishable level relatively easily. For users wishing to create a good map without too much thought I would recommend this worksheet. For those without their own ...
Clipping a Surface By a Polygon
Background: A common function in standard GIS software enables users to create a raster surface and extract values or clip it based on a set of polygons. This may be used in cases where you want analysis to be constrained to within a town’s boundaries or a coastline. This tutorial will outline how to create ...
Popular Posts
-
Naming Rivers and Places
A map doing the rounds at the moment (thanks to a plug...
-
The Best of 2011
As 2011...
-
Global Migration Maps
Migrations of people have existed for millennia and occur...
-
Great Maps with ggplot2
The above...
From CASA
- Windows Phone 7 – App in 30 days
- Twitter data – visualised by our MRes students
- Martin Dodge, ex-CASA, wins AAG Meridian Prize for his Book Code/Space
- Satellite Meeting at ECCS 2012: Complexity in Spatial Dynamics
- Geospatial Science Seminar 31.01.2012
- Data Space: Agent Based Models, SketchUp, Visualisation, ArcGIS and Lumion
- London Cycle Hire and Pollution
- Great Maps with ggplot2
Copyright © 2010 - Spatial Analysis - All rights reserved. Conforms to W3C Standard XHTML & CSS
Recent Comments