Inspired by Margintale’s post “ggplot2 Time Series Heatmaps” and Google Flu Trends I decided to use a heat map to visualize sick days logged by HeiaHeia.com Finnish users. I got the data from our database, filtering results by country (Finnish users only) in a tab separated form with the first line as the header. Three columns [...]
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Recent Posts
- “High Performance MySQL” by Baron Schwartz, Peter Zaitsev, and Vadim Tkachenko; O’Reilly Media
- Measuring user retention using cohort analysis with R
- Book review: Programming Amazon EC2
- Heat map visualization of sick day trends in Finland with R, ggplot2 and Google Correlate
- Setting up and securing web server (+MySQL +Rails/PHP) on Ubuntu 10.04 LTS
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