2215 search results for "map"

Using twitteR to see, what german press secretary tweets about

June 24, 2012
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Using twitteR to see, what german press secretary tweets about

Find the HTML-slides here, and the .Rmd-file that was used to generate here. How to deal with .Rmd-files, see here What this is about These are my first steps to play around with the interface from R to twitter, using the twitteR-package. We will load the latest 1500 (maximum the API allows) tweets from the

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Nonlinear systems

June 21, 2012
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Nonlinear systems

There is a long standing debate if financial systems are truly random or contain some structure. From the study of non-linear dynamical systems and chaos one finds it is possible that even perfectly deterministic systems can appear to be random. … Continue reading →

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An example on sentiment analysis with R

June 21, 2012
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An example on sentiment analysis with R

by Yanchang Zhao, RDataMining.com There is a nice example on sentiment analysis with R at <http://viksalgorithms.blogspot.com.au/2012/06/tracking-us-sentiments-over-time-in.html>. In the example, the Wikileaks cable corpus is analyzed to track US sentiments of other countries and their presidents over time. The example describes … Continue reading →

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Body Weight in the United States – Part 3, "Contributing Factors"

June 20, 2012
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Body Weight in the United States – Part 3, "Contributing Factors"

Carbs In Part 2 of this series, micro-nutrients were cited as a non-factor for weight gain. This is not the case with macro-nutrients (carbohydrates, fats, proteins, water). While fats, proteins and water are essential (without them you could no...

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UseR 2012 highlights

June 20, 2012
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UseR 2012 highlights

The eighth annual R user conference, UseR! 2012, has come and gone — and what an event it was! I've been to five useR! conferences so far, and each one improves upon the last. This year's conference at Vanderbilt was the best so far: an outstanding location (my first visit to Nashville, a great city), excellent facilities (the lecture...

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Color Palettes in RGB Space

June 20, 2012
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Color Palettes in RGB Space

Introduction I've recently been interested in how to communicate information using color. I don't know much about the field of Color Theory, but it's an interesting topic to me. The selection of color palettes, in particular, has been a topic I've been faced with lately. I downloaded 18 different sequential color palettes from Cynthia Brewer's

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Notes from A Recent Spatial R Class I Gave

June 19, 2012
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Below is a link to a pdf (compiled with the amazing knitr package) and some accompanying data for a recent short course I gave on basic spatial data import/analysis/visualization in R. The class was only two hours and some of the participants were bein...

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Notes from A Recent Spatial R Class I Gave

June 19, 2012
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Below is a link to a pdf (compiled with the amazing knitr package) and some accompanying data for a recent short course I gave on basic spatial data import/analysis/visualization in R. The class was only two hours and some of the participants were bein...

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[R-pkgs] igraph 0.6 released

June 18, 2012
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Dear All, we have released version 0.6 of the igraph package today. This is a major new version, with a lot of new features, and (sadly) it is not completely compatible with code that was written for the previous igraph versions. (See “Major new features” below for details.) I have included below a list of (bigger) changes. Please see...

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Tracking US Sentiments Over Time In Wikileaks

June 18, 2012
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Tracking US Sentiments Over Time In Wikileaks

Introduction I recently posted about using the Wikileaks cable corpus to find word use patterns, both over time, and in secret cables vs unclassified cables. I received a lot of good suggestions for further topics to pursue with the corpus, and probably the most interesting was the idea to do sentiment analysis over time on a variety of...

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