A number of posts about:

Math

High tech's hottest calling

January 26, 2012

The NYT's Bits blog has a new post on "high tech’s hottest calling:" statistical analysis. The article isn't just about the jobs market, focusing as well on students' increased demand for statistics classes at top universities. The opening anecdote will be familiar to anyone in the field: “Most of my life I went to parties [...]

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Have your math and eat it, too

January 11, 2012

Here are two of my favorite things, unexpectedly combined: This is from the slideshow accompanying a brief NYT article on an unusual book called Pasta by Design. The book is about, yes, modeling pasta in Mathematica. (via FlowingData)

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Brilliant

November 27, 2011

Six famous thought experiments, each presented in 60 seconds: Reminds me a bit of the Peabody and Sherman sketches from the old Rocky and Bullwinkle show...

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Stat is magic

October 13, 2011

I really love the latest post on Lessons from my Twenties, called Stat Is Magic. Sometimes, things are better left as magic.

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Elegance

September 19, 2011

I'm a huge fan of Tom Lehrer and have mentioned him a number of times before. I just came across an interview with him from 2000 in which he discussed his dual life as a mathematician and performer. I especially loved this quote, on the concept of "elegance" in mathematics: I think the construction part, [...]

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What's a 4?

September 19, 2011

I'm starting to feel this way sometimes.

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Bayes, prior to reading

August 16, 2011

I may have to go pick up this book, which was reviewed in the NYT last week, if only because it opens with a favorite quote from Keynes. Titled The Theory That Would Not Die: How Bayes' Rule Cracked the Enigma Code, Hunted Down Russian Submarines, and Emerged Triumphant from Two Centuries of Controversy (Wow, titles are getting [...]

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Defining chaos

July 29, 2011

I've been doing a lot of reading on chaos, in particular on the nature of chaotic systems. I was recently trying to explain to a friend why a dynamic system, which can be perfectly captured by a "deterministic" equation, can nonetheless exhibit chaotic behavior. His refusal at first to accept that fact reminded me of my [...]

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If only...

July 28, 2011

Via SMBC:

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Data science vs business intelligence

June 30, 2011

Steve Miller has written a nice two-part piece on data science for Information Management. Part 1 overviews the topic, including links to many pieces that have been profiled on TGR. Part 2 is a more direct comparison of data science and "business intelligence," a somewhat lackluster (but growing) field of data analytics. One quote stood [...]

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Lightning does strike twice

October 20, 2010

Remember that Bulgarian lottery that happened in a bar that drew the same numbers in consecutive weeks? (TGR covered it extensively here and less extensively here.) Well, it turns out lightning does strike twice: the Israeli lottery had the same winning combinations come up just three weeks apart - though the numbers were drawn in a [...]

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Benoit Mandelbrot, 1924 - 2010

October 18, 2010

Benoit Mandelbrot had a greater academic impact on my life than perhaps any other person. I was deeply saddened to learn he had passed away. The NYT has prepared an obituary.

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Risk & risk management

June 30, 2010

An overview of financial risk and the risk management process.

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What is data science?

June 3, 2010

The latest in a series of articles on the topic, Mike Loukides of O'Reilly Radar asks, "What is data science?": We've all heard it: according to Hal Varian, statistics is the next sexy job. Five years ago, in What is Web 2.0, Tim O'Reilly said that "data is the next Intel Inside." But what does that statement [...]

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Beware statisticians bearing gifts

May 24, 2010

The NYT is running a great article about the influx of data in today's world. The prime argument borrows from Einstein's quote, "Not everything that can be counted counts, and not everything that counts can be counted." I think this speaks volumes and should be heeded by the sites that persist in churning out infographics [...]

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Alice in Numberland

March 9, 2010

Fascinating... far from being a psychedelic tour of the imagination, one graduate student argues that Alice in Wonderland is actually a satire of Victorian mathematics: Yet Dodgson [Lewis Carroll] most likely had real models for the strange happenings in Wonderland, too. He was a tutor in mathematics at Christ Church, Oxford, and Alice’s search for [...]

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Don't touch that Sortino ratio

March 2, 2010

Analyzing different -- and potentially misleading -- ways of calculating a Sortino ratio.

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The mathematician's lens

January 25, 2010

A beautiful article in the NYTimes contrasts abstract mathematics with the chilling reality of the Mexican drug cartel wars: I was born in Mexico City, in a world that seems less and less familiar to me. I live now in the opposite corner of the continent. I am training to be a political scientist at [...]

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011110

January 11, 2010

Today's date represents a binary string. So did yesterday's. So will November 1's. This is not news. But today's is a palindrome. This is slightly more newsworthy. Geeks, rejoice.

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More mainstream Bayesians

December 20, 2009

The NYT recently ran an article on the math behind the recent and controversial mammogram advisory change. Unsurprisingly, it is heavily centered on a Bayesian argument. Of course, the key point here is not that the statistics dictated the change, but that budgets and political agendas dictated an acceptable level, which the statistics subsequently informed: [...]

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Professor Risk

December 13, 2009

David Spiegelhalter is the Professor of the Public Understanding of Risk at Cambridge University. He has recently produced the following video to encourage better practices in the casual perception of risky behaviors: I think it's a brilliant video and would love to have been one of Professor Spegelhalter's students. I firmly believe that the study [...]

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Parallel processing

December 11, 2009

Via Spontaneous Symmetry, a fascinating story about parallel processing and the power of blogging: Normally, when [a mathematician] seeks a proof, he locks himself in a room with a chalkboard for long periods of time. He may consult his peers at his university, he may read books, he may look through papers, but the majority [...]

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Great expectations

November 27, 2009

I've previously covered the danger of attributing meaning to a forecast which is obviously based on little or no information. In that case, it was the manufacturing survey, which one might dismiss as a more obscure measure. Recently, however, Ken Houghton has written a pair of posts on inflation forecasts that bring me back to [...]

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He clearly didn't give it 110%

November 17, 2009

Silicon Alley Insider is running a series of posts called "15 _______ questions that will make you feel stupid." The blank has been filled twice with "Google interview" and most recently with "management consultant interview." I particularly enjoyed one of the Google questions: If the probability of observing a car in 30 minutes on a [...]

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Choropleths in R (yes, "choropleths")

November 12, 2009

Using R to recreate color-indexed maps of US unemployment data.

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Math is hard!

November 11, 2009

Via Spontaneous Symmetry, it appears that some people are a bit rusty on their math. The town of Truro, MA recently voted on a proposed zoning measure which required a two-thirds approval to pass. Out of 206 people, 136 voted in favor - just shy of the required two-thirds. Or was it? The exact count [...]

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Ten statisticians every psychologist should know

November 11, 2009

Psychologist Daniel Wright has published a list of ten statisticians every psychologist should know. The list is comprised of The Founding Fathers: 1. Karl Pearson - who established statistics as an academic discipline 2. Ronald Fisher - who developed much of statistics' mathematical foundation, including ANOVA and maximum likelihood, and the importance of p-values 3. [...]

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Living in a Bayesian world

October 30, 2009

Increasingly, I've noted in my discussions with statisticians and practitioners a reliance on Bayesian methods. Bayesian statistics rely on an understanding of the uncertainty of a hypothesis. For example, Bayesian hypotheses are literally updated as new information becomes available. Bayesian analyses will also rely heavily on conditional probabilities, or the understanding of likelihoods that depend [...]

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How Shazam works

October 28, 2009

Ever wondered how song-identifying iPhone app Shazam works? Now you know. (For the link-averse: it's a pretty cool implementation of pattern matching across song spectograms, and the key insight was to first reduce the spectograms by including only peak frequencies. Simple, yet genius.) (via Revolutions)

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The Yom Kippur effect

October 1, 2009

You may have noticed a minor obsession with traffic amidst TGR's usual fare, which is why I was especially interested in a recent Freakonomics piece called "A Gut Yontif for L.A. Drivers" (Gut Yontif is a traditional Yiddish greeting used on Yom Kippur - it literally means "good holiday"). The post's motivation is purely anecdotal [...]

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