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Name: Lee Byron
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Too sexy for its own good? Ebb and Flow At the Box Office
March 30th, 2009 at 23:20Gert - I certainly think this specific pitfall could very potentially be minimized by starting layers at full height rather than interpolating up from 0.
Interpolation is a tricky subject which is always the subject of hot debate. I must say that interpolation is more than just a purely aesthetic decision, and can often help people better understand a data set when the available resolution is low or contains unrelated signals (such as weekly undulations). That said, filling in the gaps in the story has pitfalls as well, and those pitfalls are different based on each story, data set and visualization technique.
The problem which you have clearly (and rightfully) criticized in this case, is the misleading interpolation specifically between the pre-release week (which is always 0), and the first release week (which will always be high). You can assume some lead up of course, but likely for movies, that lead up is very fast - perhaps much of the revenue in the first week is made in the first days - and so this interpolation which moves from 0 to peak over the course of a week is likely not accurate.
I think this is a great observation, and could be an interesting modification to the streamgraph technique. I intend to investigate. Thanks again for the thoughtful critique.
Too sexy for its own good? Ebb and Flow At the Box Office
March 30th, 2009 at 03:22This is a fantastic critique and really highlights the trade offs made designing this graphic. Density vs detail is a common theme in printed graphics. Interpolation vs discreet units is another.