Paul Crowley (
ciphergoth) wrote2008-10-23 04:39 pm
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Does my new chart make sense?
Imagine for a moment that it's 2:30 AM London time on November 5th and like me, you've stayed up late to watch the US elections. Six states have been called so far: Vermont and Virginia for Obama, and Indiana, Georgia, South Carolina and Kentucky for McCain. You go to my election page and see this diagram:

Does it make sense to you? How could I improve it?
thanks!
Update: wow, a flood of very helpful comments, thanks so much, keep them coming!
Does it make sense to you? How could I improve it?
thanks!
Update: wow, a flood of very helpful comments, thanks so much, keep them coming!
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*twists head*
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I was assuming that the distance each one is to either side is the probability they have of falling either way - but that can't be the case (because of Virginia). I also don't understand why some are highlighted - I thought it might be "called" ones, but that also doesn't seem to be the case.
So some explanation would seem to be necessary.
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The width of each bar appears to be based on that state's number of electoral college votes, which is also the number in parentheses after the state's name.
But then there are three separate things represented on the diagram which look as if they're related to which way the state votes or voted: the colour of the bar (blue or red), the height of the bar (and in particular whether that height is positive or negative), and the position of the state on the x-axis. Clearly all of these are largely correlated but not completely; so clearly they're all representing three correlated but distinct things. But which? Why do some bars have positive height but are red rather than blue? What's the significance of there being a couple of red bars on the mostly-blue side of the diagram?
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And what's with the blue/purple colour alternation when there's no such thing for the red?
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Thoughts
I get the area/height thing, that's fine.
Having colour represent "last time" is difficult and counter-intuitive. Having label colour for this time and block colour for last time may better indicate the idea of a change.
The bit that gives me real trouble though is that you've got two qualities declared on the same (currently horizontal) continuum; vote proportion and called / uncalled. You've also got lines representing both centre point and status boundary.
There'd be an obvious solution if everyone had 3d monitors...
I also find the states moving *outwards* as they declare unintuitive. Pending states should be "in the wings"; declared should be "centre stage". I'd put a small (5px?) gap instead of the outer lines.
I'd be inclined to put uncalled states in outline only, too. That way states fill out and move centre stage as they declare.
(The "stage" metaphor actually works better if you *don't* turn 90°)
Re: Thoughts
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I find it unclear as to which states have declared and which are still to do so. The thin grey lines are not enough (for me). Is it possible to use differing shades of red and blue...darker for those already declared, pastel for those still to come in. Although I (and many/most?) of your 'readers' know that blue is used for the Democrats and Red for Republicans I would still make that clear, and also what the differing shades mean on the graph itself.
I hope that helps a little.
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The only minor thing I wasn't clear about was e.g. whether the swing in Virginia was predicted by the polls (are the results going as expected), but to be honest, I'm not sure that type of information could be included without reducing the clarity of the chart.
Am I correct in thinking that the chart currently predicts an Obama win by 4 votes in the electoral college ?
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Edge cases
How will your chart display a state where the networks have called it as being too close to call?
Re: Edge cases
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I'm slightly confused by the fact that the area of each bar has no particular meaning. I keep wanting it to be a histogram.
If I were doing this, I would make the height of the bar the number of college votes, and the width uniform, and either leave the polls out of it or use some kind of error bar to show the current status. I'm not saying you should do what I'd do, though.
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Sorry, not helpful at all. But it is My Husband.
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