This is the best population visualization I've ever seen. It's striking that spikes turned out to be so superior to heatmaps. It's possible to intuit the whol

This is the best population visualization I've ever seen. It's striking that spikes turned out to be so superior to heatmaps. It's possible to intuit the whole dataset at a glance, whereas heatmaps force you to constantly worry about the meaning of every color in relation to every other color. It's obvious in retrospect why spikes are superior: precision. Spikes represent the underlying data much more accurately than colors, especially between datapoints.