806 search results for "maps"

Mapping locations in R with the Data Science Toolkit

May 18, 2011
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Mapping locations in R with the Data Science Toolkit

Pete Warden's Data Science Toolkit (which we mentioned briefly last week) is an open-source information server that provides an API you can query for information useful for building data science applications, like identifying proper names in unstructured text, or converting IP addresses to lat/long coordinates. You can make queries via the Web interface or by direct interface to the...

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In case you missed it: April Roundup

May 17, 2011
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In case you missed them, here are some articles from April of particular interest to R users. The Heritage Health Prize, a competition to build predictive models for hospitalization with USD$3.2M in prizes, is open. The Inside-R.org community site now provides the ability to search and view the help files for CRAN packages. Revolution R Enterprise 4.3 released: R...

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Mapping points

May 16, 2011
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Mapping points

Since I look at mercury concentrations at different measurement stations in North America, visualization using a map with values (of your favourite parameter) plotted as colour-coded circles is quite useful. After some trial & error, here is some very basic code … Continue reading →

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Review of 2011 Data Scientist Summit

May 13, 2011
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Review of 2011 Data Scientist Summit

Some time over the past 6 weeks I randomly saw a tweet announcing the “Data Scientist Summit” and shortly below it I saw that it would be held in Las Vegas at the Venetian. Being a Data Scientist myself is reason enough to not pass up this opportunity, but Vegas definitely sweetens the deal! On Wednesday I woke up...

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Sustainable Futures conference in Manchester

Sustainable Futures conference in Manchester

Recently, Kevin Ummel gave a short conference about his PhD research at the Sustainable futures – Tyndall Centre researchers’ international conference. His work, named “Optimizing worldwide deployment of wind and solar power technologies via a high resolution, linear programming model”, is built with R. He is using the solaR package for the solar irradiance calculations,

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Location Tracking on Android, too!

April 23, 2011
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Location Tracking on Android, too!

This week it was revealed that the iPhone stores users’ locations, and this immediately caused a huge firestorm of commentary by tech geeks, panic among privacy advocates, and delight to data geeks like myself. Even better/worse, it seems that the iPhone caches location traces long-term, possibly back to the date the phone was activated. I ditched my iPhone this past...

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How to load your iPhone location data into R

April 22, 2011
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How to load your iPhone location data into R

Earlier this week, data scientists Pete Warden and Alasdair Allen reported that iPhones and cell-enabled iPads keep an internal log of the devices location, which is accessible from the backup that iTunes creates when you sync the device. (Update Apr 27: Apple responds that the locations are those of nearby cell towers and wi-fi hotspots, not the device itself.)...

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iPhone geo-tracking database

April 20, 2011
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iPhone geo-tracking database

So the web lit up a little today with news that iPhones are collecting time-stamped location data, and in a form that isn’t particularly hard to look at (and even with some nice apps to make animated maps of your travels etc): The database is SQLite, and I used R (and the RSQLite package) to

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Measuring Price Dispersion of Marijuana

April 12, 2011
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Measuring Price Dispersion of Marijuana

The intersection of mapping APIs, fast database operations and user engagement offers a lot of very cool crowdsourcing applications ranging from the benign and powerful (Google’s Person Finder) to the minor and questionable (A DUI checkpoints app). Most intriguing in … Continue reading →

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merge with solaR

merge with solaR

The version 0.22 of solaR includes a new method, mergesolaR. It is designed to merge daily time series of several solaR objects. For example, we can obtain the daily irradiation of the whole set of meteorological stations of Madrid (Spain) and use this information to calculate the productivity of a grid connected PV system. It

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