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Jon Peltier

I like Derek's suggestion.

Martin

Is the data available? I would like to run it through the different variation of mosaic plots.

(btw. who came up with "Merimekkos"? Mosaic's are just fine; seems to be a good marketing idea to increase attention on an established concept...)

Kaiser

Martin: here is a CSV of the data

Source,CO2,Methane,NO
Industrial processes,20.6%,0.9%,5.9%
Transportation fuels,19.2%,0.0%,1.1%
Agricultural byproducts,0.0%,40.0%,62.0%
"Fossil fuel retrieval, processing and distribution",8.4%,29.6%,0.0%
"Residential, commercial and other sources",12.9%,4.8%,1.5%
Land use and biomass burning,9.1%,6.6%,26.0%
Waste disposal and treatment,0.0%,18.1%,2.3%
Power Stations,29.5%,0.0%,1.1%

Ajay

A bit late to the defence of the Mosaic chart :-) but well if you were to increase the number of categories (from 3 to say 10 (contstrain the chart to the same overall area), the alternate solution would be approaching the "junk" status.

I think mosaics do have value under some circumstances, especially when you don't need to get the exact value but establish a mental map of how each element stands in the grand scheme of things.

Another point taht I think most people miss is that mosaics would seem more 'readable' if they were to be plotted as a square rather than a rectangle. If the chart in the example had been a square, an average reader would have a better chance of being able to 'grasp' (not 'know') the entire picture.

I agree that they share some of the same problems inherent in the pie chart but I would mind if all mosaics should be accorded the junk status.

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Marketing analytics and data visualization expert. Author and Speaker. Currently at Vimeo and NYU. See my full bio.

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