Reading

Rachel features some poor bubble charts on Stats Chat, which is the blog of the Auckland Statistics department. (here, and here)

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Martin discusses color scales on maps. (link)

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The JMP blog takes on the challenge of visualizing European debt data (link). We discussed this some time ago (link). The difficulty of this data set is that for each pair of countries, there are two values, and each country can simultaneously be lending to and borrowing from the other.