So I'm a little confused by the election results numbers coming out of San Francisco right now. The first-choice results on sfelections.sfgov.org/novemb… don't match the short RCV tables at sfelections.sfgov.org/novemb… and neither matches my calculations at dbaron.org/sf-elections-rcv/ . 1/2
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The errors are pretty small -- but I'd have expected these things to match. I suppose the least bad explanation is that the reports were produced at slightly different times during a count that was adding ballots to the dataset. We'll see if the later results match... 2/2
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OK, I figured out why my numbers didn't match the city's RCV results; I needed to discard marks that had the IsAmbiguous field set to true. So at least my RCV tables match the city's tables now.

Nov 6, 2019 · 6:32 AM UTC

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Replying to @davidbaron
Is this because SF moved from “complete the arrow” to “fill in the circle” ballots?
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Well, they moved to an entirely new voting system that produces output in a different format that I needed to implement support for. I had a test dataset last week, but I didn't have the corresponding tables from the city to check my output against, so I needed to do that live.
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