Tomislav Hengl of the University of Amsterdam has published new book, A Practical Guide to Geostatistical Mapping. It's jam-packed with 291 pages on mapping and analyzing spatial data using free software including R, SAGA, GRASS, ILWIS and Google Earth, and freely-available map data. The book itself is also available for free, as an Open Access Publication. You can order...
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O’Reilly at OSBC: The future’s in the data
Tim O'Reilly's keynote talk at OSBC this evening was thought-provoking to say the least. The title of the talk was "The Real Open Source Opportunity", and the surprise for me was that he wasn't talking about Open Source software. Tim's insight, and it's a profound one, is that the next frontier for freedom and openness -- and indeed, the...
ggplot and concepts — what’s right, and what’s wrong
A few months back I gave a presentation to the NYC R Meetup. (R is a statistical programming language. If this means nothing to you, feel free to stop reading now.) The presentation was on ggplot2, a popular package for generating graphs of data and statistics. In the talk (which you can see here, including
Time Series Calendar Heat Maps Using R
I came across an interesting blog that showcased Charting time series as calendar heat maps in R . It is based upon a great algorithm created by Paul Bleicher,CMO of Humedica. I'll let you link to the other blog to see more details on the background ...
How to make a mosaic plot in R
Mosaic plots (aka treemaps) are a great way to visualize hierarchical data. A collection of rectangles represents all the elements to be visualized (customers, news items, blog posts), with the size and color of the rectangles coding attribute. But what makes this chart unique is the arrangement of the elements: where there is hierarchy (customer segments, news topics, post...
Rcpp 0.7.5
pre{ border: 1px solid black; font-size: x-small ; } Dirk released Rcpp 0.7.5 yesterday The main thing is the smarter wrap function that now uses techniques of type traits and template meta-programming to have a compile time guess at whether a...
Rcpp 0.7.5
A new release of our Rcpp R / C++ interface classes is now out, the version number is 0.7.5. It comes on the heels of the release 0.7.4 and keeps with our semi-frantic schedule of releases every ten or so days going. The package is now on CRAN and Debi...
Rcpp 0.7.5
A new release of our Rcpp R / C++ interface classes is now out, the version number is 0.7.5. It comes on the heels of the release 0.7.4 and keeps with our semi-frantic schedule of releases every ten or so days going. The package is now on CRAN and Deb...
In case you missed it: January roundup
In case you missed them, here are some articles from last month of particular interest to R users. This post linked to slides and video from a 30-minute "Introduction to R" talk I gave on January 28, with links to many useful R resources. This post brought news that R's creators Robert Gentleman and Ross Ihaka have jointly won...
Ensemble Prediction
Weather is unpredictable. Small differences in initial conditions can develop into big differences in the pattern of circulation, in the timing and location of cyclones, rainfall etc. This is true no matter how good the initial observing system is. The approach taken by organisations such as ECMWF or NCEP is to re-run numerical forecast models
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
