2/ What do I mean? The rouble falling in value by 50% moves it from 30 to 60 - 3 divisions. The rouble falling in value by ANOTHER 50% ...moves it from 60 to 120 , or 6 vertical divisions. The number of divisions has doubled...to express a fall in value that's only 1/2 as big
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3/ If the rouble fell to $0, how many vertical divisions would it require to show this? INFINITE vertical divisions. This is absolute garbage data visualization.
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4/ The correct approach, IMO, is to change the Y axis to $/rouble. Top of Y axis should be relabeled $0.20. Bottom of Y axis should be relabeled $0.00.
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5/ Every single American is used to thinking in terms of "how much does X cost in terms of American dollars?". ...and they're used to linear scales, not log. You show a graph of MSFT prices? Y axis = price in $; linear scale.
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6/ You show a graph of gasoline prices? Y axis = price in $; linear scale. You show a graph of pork chop prices? Y axis = price in $; linear scale. I have zero idea why someone would praise this garbage unintuitive graph as good. I doubt 1 reader in 10 realizes its log.
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