2440 search results for "gis"

Custom Amazon EC2 config for Rstudio

February 29, 2012
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IntroductionThis post is a work in progress building on the previous post. It's my attempt to simultaneously learn Amazon's AWS tools and set up R and Rstudio Server on a customized "cloud" instance. I look forward to testing some R jobs that have la...

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Webinar tomorrow: Big-data statistics with Revolution R with IBM Netezza

February 28, 2012
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As explained in detail by Michele Chambers at the IBM Netezza blog, there are two keys to getting fast performance with statistical analysis on massive data sets with R: Massive parallelization: break the problem down into small pieces, and run them in parallel Bring the R engine to the data (not the other way around), to avoid data transfer...

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R integrated throughout the enterprise analytics stack

February 27, 2012
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The past couple of years have seen a dramatic growth in the use of the R language in the enterprise. R has always been pervasive in academia for research and teaching in statistics and data science, and as new graduates trained in R have migrated to the workplace the demand for R in corporations has become more and more...

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Sensual marimba sunspots

February 25, 2012
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Here's the numbers of yearly sunspots, 1700-1988, brought to you by the nimble marimba of R: See ?sunspot.year in R for more information about the data. I did this last spring and just discovered it again. I've been so caught up in the current sound world of playitbyr (see this post for an example) that

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Webinar Wednesday: Introduction to Revolution R Enterprise

February 21, 2012
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If you haven't yet had a chance to catch my regularly-scheduled webinar, "Revolution R Enterprise - 100% R and More", it's a quick 30-minute introduction to the R language and the added features of Revolution R Enterprise. It's also a chance to ask me any questions you might have about R or Revolution Analytics during the live broadcast (starts...

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Simplifying spatial polygons in R

February 20, 2012
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Simplifying spatial polygons in R

Polygon simplification is something others have written about, using R packages such as shapefiles. This explores how package ‘rgeos’ uses the Ramer–Douglas–Peucker algorithm, a method commonly used in GIS systems for simplifying shapefiles. It works by imposing a deviation tolerance … Continue reading →

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Course: Statistical Practice in Epidemiology with R

February 17, 2012
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Course: Statistical Practice in Epidemiology with R

Statistical Practice in Epidemiology with R is a one week course aimed at promoting the use of R among epidemiologists.  This annual course has been running almost every year since 2004. Last year it took place in Lyon, France, but … Continue reading →

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draw chinese character Jiong using ggplot2

February 17, 2012
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draw chinese character Jiong using ggplot2

The Chinese character Jiong (囧) is now widely used for expressing ideas or feelings such as annoyance, shock, embarrassment, awkwardness, scorn.The function plot of y=1/(x^2-1) looks very similar of this symbol.I use ggplot2 to draw the symbol of Jiong.Read More: 359 Words Totally

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Take the INNGE survey on math and ecology

February 17, 2012
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Many ecologists are R users, but we vary in our understanding of the math and statistical theory behind models we use. There is no clear consensus on what should be the basic mathematical training of ecologists.To learn what the community thinks, we ...

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Reshaping the IT world

February 16, 2012
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Reshaping the IT world

During my university time I worked on the IT help desk for a while. One day I received a call from a professor, who said that his printer had stopped working. So I asked him, if there was a message on the display and if he could read it to me. "Oh yes"...

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