Category Archives: code
[dd3] d3.js selection tutorial
This weekend I made a video aimed at people just getting into d3. I use a super simple bar graph to illustrate the fundamental principle of selections with d3. At 13 minutes it’s a little over the 10 minute goal … Continue reading
Square Circle Spiral Illusion in d3.js
Things have been pretty intense at work the last couple weeks, we are writing hella code (you can see I’ve begun acclimating to the west coast) and a lucky few people have begun using what we’re making! This weekend was … Continue reading
Simple D3.js Bar Chart Webcast
So I’ve been diving head first into d3.js and I must say its a mighty fine library! I do feel like getting up to speed with it can take quite a bit of reading and playing, and now that I’ve … Continue reading
[RTPS] Master’s Thesis Defense Presentation
Hello World! Today I became a computational science ninja master! Well, maybe not so much the ninja part, but my vim skills are starting to feel like Jedi powers. This morning I gave an hour long presentation on my work … Continue reading
LBL Summer Research: Final Report
The summer months certainly fly by, especially when you are running in parallel… Anyway, the project has culminated in some working code and interesting test runs on the Longhorn visualization cluster. We are using some actual flow data sets, for … Continue reading
LBL Summer Research: Report 2
So I’ve been up in the Berkeley hills for a few weeks now, coding by day and hacking by night. I’ve made some progress at work which I will detail here, which includes some things I’ve been wanting to do … Continue reading
Silenced
This past weekend I attended Data Insight and hacked alongside a great group of people. Our team had a lot of fun and learned a lot by tackling a tough issue, child abuse. We used the statistics for 2002 from … Continue reading
LBL Summer Research: Report 1
Hello world! I’m excited to be writing to you from the beautiful Bay area in California, specifically the Lawrence Berkeley National Laboratory at the top of the hill in Berkeley. This summer I’ll be working with Hank Childs and the … Continue reading
Particles in BGE: Improved Code, Collisions and Hose
Hello world! I’m back with another video to show you guys what we are cooking up here at DSC. I’ve made a lot of internal improvements to the code, but I have a little something to show as far as … Continue reading
Adventures in OpenCL Part 3: Constant Memory Structs
Today we make a brief stop on our journey to examine a technique which has proven useful but not straightforward; passing in a structure as a parameter to an OpenCL kernel as __constant memory. Why would you want to do … Continue reading
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+Ian Johnson