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Percentrank Question

  1. #1
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    Percentrank Question

    I have a column of values (actually the ^VIX volatility index values for the past 250 days).
    If I want to know where today's value of ^VIX falls within the range over the past 250 days, I can use the PERCENTRANK function.

    I recall this equation for doing a similar ranking:
    (Today's value - MIN(250 days))/(MAX(250 days) - MIN(250 days))

    Yet the answers from the two methods are completely different. Just what, if anything, is my remembered equation calculating?

    Thanks.

  2. #2
    Valued Forum Contributor dosydos's Avatar
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    Re: Percentrank Question

    I think this is what you are doing http://stats.stackexchange.com/quest...a-to-0-1-range

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