Re: [govtrack] svd-analysis.txt
- So generally, if there's no documentation on the wiki then I don't
consider the file a part of the public API --- meaning, I may change the
format at any time or get rid of it, etc. I'm happy to explain what's in
the file, but this is just a warning that you shouldn't depend on it.
The last column corresponds to the x coordinate on the political
spectrum graph, on a scale from 0 to 1.
The second column is the z-score of that value, looking only within the
party of that member of congress (or for independents, looking at all
members of congress). That is, it is the x-coordinate minus the party
mean, divided by the standard deviation of the x-coordinates within the
party. This isn't used for anything as far as I can remember --- it was
something I played with when I was creating the human-readable ideology
labels, which are now done differently (by percentiles).
- Josh Tauberer
"Yields falsehood when preceded by its quotation! Yields
falsehood when preceded by its quotation!" Achilles to
Tortoise (in "Godel, Escher, Bach" by Douglas Hofstadter)
On 03/20/2010 03:57 PM, John wrote:
> Does anyone know the definition of the two numeric columns in this file? The PersonID and the text column is obvious, but the other two aren't, though I suspect one or both of them could be used to place a person on the generated image. Perhaps these are XY coords, but I can't tell.
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