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[Brian Lalor <question218788@xxxxxxxxxxxxxxxxxxxxx>]

Question #218788 on Graphite changed:
https://answers.launchpad.net/graphite/+question/218788

    Status: Open => Answered

Brian Lalor proposed the following answer:
On Jan 9, 2013, at 7:45 PM, Steve Freegard
<question218788@xxxxxxxxxxxxxxxxxxxxx> wrote:

> Can anyone tell me how I might achieve the following using Graphite:
> 
> ((series1 - series2) / (series1 + series2)) * 100

I think you want asPercent:
http://graphite.readthedocs.org/en/0.9.10/functions.html#graphite.render.functions.asPercent

I think you could do

        asPercent(diffSeries(series1, series2), sum(series1, series2))

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