777 search results for "maps"

Magnetic Resonance Imaging in R

December 29, 2011
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Volume 44 of the Journal of Statistical Software was published in October 2011.  The special volume on “Magnetic Resonance Imaging in R” features articles and packages related to a variety of imaging modalities:functional MRIdiffusion-weighted MRIdynamic contrast-enhanced MRIdynamic susceptibility-contrast MRI structural MRIThe papers describe the methodology, software implementation and provide comprehensive examples and data. ...

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googleVis 0.2.13: new stepped area chart and improved geo charts

December 23, 2011
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googleVis 0.2.13: new stepped area chart and improved geo charts

On 7th December Google published a new version of their Visualisation API. The new version adds a new chart type: Stepped Area Chart and provides improvements to Geo Chart. Now Geo Chart has similar functionality to Geo Map, but while Geo Map requires ...

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An R function to map your Twitter Followers

December 21, 2011
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An R function to map your Twitter Followers

I wrote a little function to make a personalized map of who follows you or who you follow on Twitter. The idea for this function was inspired by some plots I discussed in a previous post. I also found a lot of really useful code over at flowing data he...

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December 2011 issue of the R Journal: An overview

December 20, 2011
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December 2011 issue of the R Journal: An overview

The December 2011 issue of the R Journal is now available for download. Three times a year, the open-access journal of the R project publishes peer-reviewed articles on research and applications of R and R packages. As of the latest issue, all articles are published under a Creative Commons license, making them accessible for translation, academic and commercial uses...

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Spatial Data with R

December 19, 2011
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Spatial Data with R

On September 14th 2011 Dr Alec Stephenson gave a talk on exploring spatial data with R (see Meetup page). The video of the talk is now available online. The talk provides a non-mathematical and entirely equation-free talk on visualizing and … Continue reading →

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Backtesting Minimum Variance portfolios

December 12, 2011
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Backtesting Minimum Variance portfolios

I want to show how to combine various risk measures I discussed while writing the series of posts about Asset Allocation with backtesting library in the Systematic Investor Toolbox. I will use Minimum Variance portfolio as an example for this post. I recommend reading a good discussion about Minimum Variance portfolios at Minimum Variance Sector

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Mapping prosperity in France with R

December 12, 2011
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Mapping prosperity in France with R

The choropleth below (created by Baptiste Coulmont) is a sort of prosperity map of France: the blue areas have high levels of personal income (actually, median household income tax paid divided by the number of household members), while the red areas have the lowest: The map was created with the help of GEOFLA "communes" shapefile (my high-school French begins...

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UseR! 2011 slides and videos – on one page

December 11, 2011
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Links to slides and talks from useR 2011 - all organized in one page.Read more »

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Visualizing Gestures as Paths

December 11, 2011
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Visualizing Gestures as Paths

Kaggle is hosting an exciting new competition in which the object is to learn to identify sequences of gestures from just one example of each gesture. I would bet this competition has a lot of potential to attract academics interested in machine learni...

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LondonR, 6 December 2011

December 10, 2011
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LondonR, 6 December 2011

The London R user group met again last Wednesday at the Shooting Star pub. And it was busy. More than 80 people had turned up. Was it the free beer and food, sponsored by Mango which attracted the folks or the speakers? Or the venue? James Long, who or...

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