767 search results for "maps"

Rcpp 0.8.0

May 12, 2010
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Summary Version 0.8.0 of the Rcpp package was released to CRAN today. This release marks another milestone in the ongoing redesign of the package, and underlying C++ library. Overview Rcpp is an R package and C++ library that facilitates integr...

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Collect and Parse GPS (NMEA0183) Data in R

May 11, 2010
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I recently wrote a serial connection for R-2.11.0 so that I can communicate with serial devices, for example an old Garmin eTrex Legend. This GPS device is able to output NMEA0183 sentences to a standard serial port (4800,8,1,N). I hooked up the device and used the serial connection to collect some data using some R

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Example 7.31: Contour plot of BMI by weight and height

April 5, 2010
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Example 7.31: Contour plot of BMI by weight and height

A contour plot is a simple way to plot a surface in two dimensions. Lines with a constant Z value are plotted on the X-Y plane.Typical uses include weather maps displaying "isobars" (lines of constant pressure), and maps displaying lines of constant e...

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A free book on Geostatistical Mapping with R

April 2, 2010
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A free book on Geostatistical Mapping with R

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

March 17, 2010
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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...

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ggplot and concepts — what’s right, and what’s wrong

March 7, 2010
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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

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How to make a mosaic plot in R

February 16, 2010
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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...

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Rcpp 0.7.5

February 9, 2010
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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...

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Rcpp 0.7.5

February 9, 2010
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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...

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Rcpp 0.7.5

February 9, 2010
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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...

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