Category Archives: Graphs
Science Blogging Conference in January
The 2008 Science Blogging Conference is coming up January 19. I attended last year and will be co-leading a session this year on “Public Scientific Data”. My selfish interest in public data is wanting to try to improve the visualizations … Continue reading
Chapel Hill 2007 Town Council Election Graphs
Here is a summary graph of the 2007 Chapel Hill Town Council elections [source data]. Each horizontal bar is a precinct, and the heights are proportional to the number of votes cast in each precinct. Each color is a different … Continue reading
Income Share Graph
After my last graph analysis, a reader asked that I review the following graph from a New York Times columnist’s blog post on income disparity. Overall, I think this graph is good. Everything is labeled, making the message clear, but … Continue reading
Petraeus Chart
I can’t decide if this final chart from General Petraeus’s report is the worst ever or the best ever. What makes it the worst chart? Mainly the axes. unlabeled Y axis — you have to rely on the text of … Continue reading
Problem 156 Graphs
Problem 156 at Project Euler is one of the few without a specified limit. That is, most problems might ask for something like the sum of all solutions to an equation that are less than a billion. This one just … Continue reading
Casualties Graph
Today’s Raleigh News & Observer ran an article about increased casualties within the 82nd Airborne Division, which is based here in North Carolina. There was a graph showing casualties by year, with the 2007 total being incomplete. A reader objected … Continue reading
Heat Map Valentine
This is a heat map graph of a mathematically generated data set with a little noise added for artistic effect. Next year I’ll work on anti-aliasing the edges.