Hermann Weyl, CPA

October 12th, 2008

Our federal income tax law defines the tax y to be paid in terms of the income x; it does so in a clumsy enough way by pasting several linear functions together, each valid in another interval or bracket of income. An archeologist who, five thousand years from now, shall unearth some of our income tax returns together with relics of engineering works and mathematical books, will probably date them a couple of centuries earlier, certainly before Galileo and Vieta.

Hermann Weyl

Embeddable Timelines

August 8th, 2008

Powered by Dipity, which is like SIMILE’s TimeLine but less nerdy and more viral. TimeLine has a nice tiered two-resolution navigation paradigm which makes it more suitable for visualizing data sets containing data over several time orders of magnitude.

via Valleywag.

IMDB Top 250 Movies Scatterplot

July 28th, 2008

You can interact with the embedded gadget above, or follow this link for a much bigger view.

I’ve been investigating Google’s new Visualization API and created this scatterplot of the IMDB’s top 250 movies. It’s more readable if you switch the “size” select from “Same size” to “Votes.”

IMDB uses a “true Bayesian Estimate” to compute these scores.

The formula for calculating the Top Rated
250 Titles gives a true Bayesian estimate:

weighted rating (WR) = (v ÷ (v+m)) × R + (m ÷ (v+m)) × C

 where:
  R = average for the movie (mean) = (Rating)
  v = number of votes for the movie = (votes)
  m = minimum votes required to be listed in the Top 250
  C = the mean vote across the whole report (currently 6.7)

This is intended to correct for the uncertainty of providing a rating when you have only a few votes; the fewer votes a movie has, the more its rating is allowed to drift back toward the average rating of all movies.

IMDB’s list skews heavily toward newer releases. I haven’t seen The Dark Knight yet, and it’s possible that it actually is the greatest movie of all time. The Shawshank Redemption? It was good, but second best of all time?

I plotted the data and see if there’s a correlation between recency of release and rating (there is, visible in the general up-and-to-the-right slope). If you switch the axes so that you’re viewing votes vs. release year, you’ll see the same trend, but even more pronounced.

The next logical analysis would look at the movies’ raw ratings, before the true Bayesian estimate correction is applied.

The documentation for the “Motion Chart” Gadget I’m using isn’t really clear on how to make size default to votes in the published/embedded gadget. It seems like the fifth column in the Google Docs spreadsheet is used for this purpose, but the gadget ignores the fifth column. If anyone knows the solution, let me know.

Processing Video

February 15th, 2008

Solar, with lyrics. from flight404 on Vimeo.

Habeas Corpus

February 8th, 2008

The power of the Executive to cast a man into prison without formulating any charge known to the law, and particularly to deny him the judgment of his peers, is in the highest degree odious and is the foundation of all totalitarian government whether Nazi or Communist.

— Winston Churchill, November 21, 1943

Except as provided in section 1005 of the Detainee Treatment Act of 2005, no court, justice, or judge shall have jurisdiction to hear or consider an application for a writ of habeas corpus filed by or on behalf of an alien detained by the United States who has been determined by the United States to have been properly detained as an enemy combatant or is awaiting such determination.

— §1005(e)(1), 119 Stat. 2742. - Military Commissions Act of 2006

(Comparison lifted from Rob Sanheim’s Panasonic Youth)

Efforts

February 5th, 2008

Tie two birds together. They will not be able to fly, even though they now have four wings.

—Idries Shah, The Way of the Sufi

People in Order

January 12th, 2008

The Loudness Wars

October 4th, 2007

Lazy Futures and Thunks

September 18th, 2007

A lazy future is similar to a thunk (in the sense of a delayed computation).

Wikipedia

W Hotel Chicago City Center

July 18th, 2007

Whotellobby-2


Map by Maplets

Modern, Good Location

Jul 18, 2007Justin Knoll

★★★☆☆ We just got back from a long weekend at the Pitchfork Music Festival and the W Hotel in Chicago. We were familiar with the W Hotels, but had never stayed at one. After booking the room, but before boarding the Amtrak Hiawatha for the trip, we Googled the place and found that the reviews were split between one and five stars, with little middle ground.

Many of the one star reviewers complained about the loud music, low light, or inattentive doormen. To the first two: yes, but this is the W. It’s supposed to be half lounge and half nightclub, and that doesn’t leave half for hotel. We did have to open our own door on more than one occasion, but as an able bodied human being, I didn’t take offense.

The real failing of the W was in the area of caffeine. On Saturday morning I headed down to the front desk and asked about the cafe. They pointed me in the direction of a table and said the coffee was complimentary. The table held cups, three cream options per usual, etc. But in terms of actual coffee there were only two small pebble-filled white ceramic dishes with a small pool of coffee in each. Not wanting to betray my un-hipness, I regarded them coolly until I realized that they were the drip catching dishes and that the dispensers themselves were gone. I waited with my empty cup for a few minutes, then a single dispenser was carried in. It was decaf, and minutes later it still sat alone. I headed back to the room, and when I returned a bit later the whole table was gone, and I headed out to buy a coffee on the street.

Internet access in the rooms was pay-to-play, and wired, not wireless. Given the W’s target demographic, I would hope to have hotel-wide wifi included with my room, but then I’m a free wifi idealist.

They enjoy wordplay involving the letter “W,” so the courtesy phones are labeled “Whatever/Whenever,” etc. This was taken to an extreme with a graphic projected on the floor of the lobby declaring this the “Summer of Wuv,” which struck me as a taking it a bit little far.

We ordered a Chicken Breast a la Caesarini with a side of Tuscan Frites from the Ristorante We and it was good but not great and was served on slightly over-grilled (read burnt) toast. The frites were good and well cooked, but the portion very small.

On the plus side, the lobby was gorgeous. They’ve commissioned video projections which are tailored to the architecture of the lobby, so when projected they conform to the arches and crests in the high walls. They have a collection of Assouline and Phaidon design titles set out on the couches for guests to peruse. They have some beautiful wooden chessboards, but only checkers pieces (a slight mark against).

The location was excellent for our purposes, just east of the Sears Tower, close to Union Station, the Loop, the various El stops, free trolleys, and Millennium park.


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