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K-means test in Octave
Matlab comes with K-means clustering ‘out of the box’. The GNU Octave work-a-like system doesn’t, and there seem to be quite a few implementations floating around. I picked the first from Google,...
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Rorschach test: hidden structure or noise?
Birth of a nation His girl friday Nosferatu Meet John Doe Killer Shews The Amazing Transparent Man Teenagers from Outer Space Last Woman on Earth Voyage to the Planet of Prehistoric Women
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Linked Literature, Linked TV – Everything Looks like a Graph
Ben Fry in ‘Visualizing Data‘: Graphs can be a powerful way to represent relationships between data, but they are also a very abstract concept, which means that they run the danger of meaning...
View ArticleDilbert schematics
How can we package, manage, mix and merge graph datasets that come from different contexts, without getting our data into a terrible mess? During the last W3C RDF Working Group meeting, we were...
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Building R’s RGL library for OSX Snow Leopard
RGL is needed for nice interactive 3d plots in R, but a pain to find out how to build on a modern OSX machine. “The rgl package is a visualization device system for R, using OpenGL as the rendering...
View ArticleMAMP / MySQL config notes for ‘Repair with keycache’ and table metadata lock
Problem: MySQL taking forever to load some large data dumps. Forever or longer. “mysql> show processlist;” shows it wedged at “Repair with keycache” and “Waiting for table metadata lock”. According...
View ArticleEverything Still Looks Like A Graph (but graphs look like maps)
Last October I posted a writeup of some experiments that illustrate item-to-item similarities from Apache Mahout using Gephi for visualization. This was under a heading that quotes Ben Fry, “Everything...
View ArticleTalis
Most of us around RDF and the Semantic Web have by now probably heard the news about Talis; if not, see Leigh Dodds’ blog post. Talis are shutting down their general activities around Semantic Web and...
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Inmaps
From LinkedIn’s networking graphing service; see also my map I’ve been digging around in graph-mining and visualization tools lately, and this use at LinkedIn is one of the few cases where such things...
View ArticleSchema.org and One Hundred Years of Search
A talk from London SemWeb meetup hosted by the BBC Academy in London, Mar 30 2012…. Slides and video are already in the Web, but I wanted to post this as an excuse to plug the new Web History Community...
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Learning WebGL on your iPhone: Radial Blur in GLSL
A misleading title perhaps, since WebGL isn’t generally available to iOS platform developers. Hacks aside, if you’re learning WebGL and have an iPhone it is still a very educational environment. WebGL...
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Remembering Aaron Swartz
“One of the things the Web teaches us is that everything is connected (hyperlinks) and we all should work together (standards). Too often school teaches us that everything is separate (many different...
View ArticleOpenStreetMap for disaster response – raw notes from Harry Wood talk
Very raw, sometimes verbatim but doubtless flawed notes from Harry Wood‘s excellent talk at Open Data Institute in London. #odifridays Many thanks to Harry for a great talk and to ODI for putting...
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Near Futurism
Blessed with the gift-curse of seeing ~24h into the future, I spend it on bad TV. Westworld! Monday Nov 17th 2014 (IRC): 10:06 danbri: I’ve figured out what the world needs – a new modern WestWorld...
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