3857 search results for "GIS"

Sankey diagrams with googleVis

March 25, 2014
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Sankey diagrams with googleVis

Sankey diagrams are great for visualising flows from one set of data values to another. Although named after Irish Captain Matthew Henry Phineas Riall Sankey, who used this type of diagram in 1898 to show the energy efficiency of a steam engine, the best know Sankey diagram is probably Charles Minard's Map of Napoleon's Russian Campaign...

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R jobs (March 24th)

March 24, 2014
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Earlier this month I have announced the launch of R-users.com, a new R jobs website. My intention is to post around twice a month on new R jobs posted on the website. You are invited to use this link, to post new R jobs. Registration is less than 10 seconds. Here are the new R jobs:   Full-Time Data...

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Experimenting With R – Point to Point Mapping With Great Circles

March 24, 2014
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Experimenting With R – Point to Point Mapping With Great Circles

I’ve started doodling again… This time, around maps, looking for recipes that make life easier plotting lines to connect points on maps. The most attractive maps seem to use great circles to connect one point with another, these providing the shortest path between two points when you consider the Earth as a sphere. Here’s one

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Create Twitter Wordcloud with Sentiments

March 23, 2014
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Create Twitter Wordcloud with Sentiments

You can use this tutorial in the ThinkToStartR package with: ThinkToStart(“SentimentCloud”,”KEYWORD”,# of tweets,”DATUMBOX API KEY”) Hey everybody, some days ago I created a wordcloud filled with tweets of a recent german news topic. And a lot of people asked me if I have some code how I created this cloud. And so here it is. …

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Seamless analytical environment by WDI, dplyr, and rMaps

March 22, 2014
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Recently I found that My R Guru @ramnath_vaidya is developping a new visualization package rMaps. I was so excited when I saw it for the first time and I think that it's really awesome for plotting any data on a map....

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Updates on Interactive rCrimemap, rBlocks … and the Packt offer!

March 21, 2014
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Updates on Interactive rCrimemap, rBlocks … and the Packt offer!

Testing rCrimemap as a Self-Contained Web Page I've been learning more about rMaps and rCharts since the LondonR meeting. There are many amazing things you can do with rCharts but it does take time to learn all the tweaks. For example, I just discovered that the rMaps objects (like other rCharts ojects) can be...

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R: Text Mining on Twitter #PrayForMH370 Malaysia Airlines

March 21, 2014
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R: Text Mining on Twitter #PrayForMH370 Malaysia Airlines

It's been two weeks for search and rescue operations on Malaysia Airlines Flight MH370, after it vanished from the radar on March 8, 2014. And wherever they are, we hope and pray for them.Photo from VENUS - Wall of Hope & Prayers for MH370In this p...

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Aggregating spatial points by clusters

March 21, 2014
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Aggregating spatial points by clusters

With ubiquitous collection devices (e.g. smartphones), having too much data may become an increasingly common problem for spatial analysts, even with increasingly powerful computers. This is ironic, because a few short decades ago, too little data was a primary constraint. This tutorial builds on the 'Attribute joins' section of the Creating maps in R tutorial to demonstrate how clusters can be...

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Aggregating spatial points by clusters

March 21, 2014
By
Aggregating spatial points by clusters

With ubiquitous collection devices (e.g. smartphones), having too much data may become an increasingly common problem for spatial analysts, even with increasingly powerful computers. This is ironic, because a few short decades ago, too little data was a primary constraint. This tutorial builds on the 'Attribute joins' section of the Creating maps in R tutorial to demonstrate how clusters can be...

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Frequentist German Tank Problem

March 20, 2014
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Frequentist German Tank Problem

The German Tank Problem: The Frequentist Way Many things are given a serial number and often that serial number, logically, starts at 1 and for each new unit is increased by 1. For example, German tanks in World War II had several parts with serial numbers. By collecting...

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