Monthly Archives: January 2012

Scraping Flora of North America

January 27, 2012
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So Flora of North America is an awesome collection of taxonomic information for plants across the continent. However, the information within is not easily machine readable. So, a little web scraping is called for. rfna is an R package to collect inf...

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Parallel R Model Prediction Building and Analytics

January 26, 2012
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Modifying R code to run in parallel can lead to huge performance gains. Although a significant amount of code can easily be run in parallel, there are some learning techniques, such as the Support Vector Machine, that cannot be easily parallelized. However, there is an often overlooked way to speed up these and other models. It...

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Text Mining and The Danish Immigration Debate

January 26, 2012
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Text Mining and The Danish Immigration Debate

I have for a while now wanted to learn how to do text mining in R. I have played a bit around with the tm package before, but nothing really serious. Being a Danish expat that might soon move back to Denmark with a Swiss girlfriend and child, the Dani...

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Filtering a list with the Filter higher-order function

January 26, 2012
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Last week markbulling over at Drunks & Lampposts posted a method of using sapply to filter a list by a predicate. Today the @RLangTip tip of the day was to use sapply similarly. This made makes me wonder if R‘s … Continue reading →

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Social Media Interest Maps of Newsnight and BBCQT Twitterers

January 26, 2012
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Social Media Interest Maps of Newsnight and BBCQT Twitterers

I grabbed independent samples of 1500 recent users of the #newsnight and #bbcqt hashtags within a minute or two of each other about half an hour ago. Here’s who’s followed by 25 or more of the recent hashtaggers in each case. Can you distinguish the programmes each audience interest projection map relates to? Here’s the

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All I Don’t Know About Surveys

January 26, 2012
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All I Don’t Know About Surveys

I believe my survey experiment Survey Time illustrated later in this post and in Google’s Visualization of Survey Responses mainly pointed out how ignorant I am about the very complicated science of surveying from building the survey to the visualiza...

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SAS Macro Simplifies SAS and R integration

January 26, 2012
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SAS Macro Simplifies SAS and R integration

Many of us feel very enthusiastic about R. It's free, it features cutting edge applications, it has a large community of users contributing for mutual benefit, and on and on. There are also many things to like about SAS, including stability, backwards...

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Penny pinching yields pennies

January 26, 2012
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Penny pinching yields pennies

A Greek Professor of Economics has written up a thought-provoking series of articles on complexity fetishism. As part of his …Continue reading »

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A Short Example with R-Package osmar..

January 26, 2012
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A Short Example with R-Package osmar..

Following up my last post in which I praised the capabilities of the osmar-package I give a short example...ps: You can also find this example at GitHub HERE.library(osmar) # this pulls the data from the OSM-Api:mydistrict <- get_osm(relation(85647)...

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Creative Commons license

January 26, 2012
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Creative Commons license

Copyright notice: I hereby release all of the writing  content that is tagged by R, under the cc-by-sa copyrights (date: Jan 26 2012), as long as the copied content comes with proper attribution which also  includes a link to the source of the article .

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