Posted on Categories Applications, Coding, Computer Science, Exciting Techniques, Mathematics, Programming, TutorialsTags , , , , , , , 5 Comments on Automatic Differentiation with Scala

Automatic Differentiation with Scala

This article is a worked-out exercise in applying the Scala type system to solve a small scale optimization problem. For this article we supply complete Scala source code (under a GPLv3 license) and some design discussion. Continue reading Automatic Differentiation with Scala

Posted on Categories Computers, Opinion, Programming, TutorialsTags , , , , , , , , , , 2 Comments on Must Have Software

Must Have Software

Having worked with Unix (BSD, HPUX, IRIX, Linux and OSX), Windows (NT4, 2000, XP, Vista and 7) for quite a while I have seen a lot of different software tools. I would like to quickly exhibit my “must have” list. These are the packages that I find to be the single “must have offerings” in a number of categories. I have avoided some categories (such as editors, email programs, programing language, IDEs, photo editors, backup solutions, databases, database tools and web tools) where I have no feeling of having seen a single absolute best offering.

The spirit of the list is to pick items such that: if you disagree with an item in this list then either you are wrong or you know something I would really like to hear about.

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Posted on Categories MathematicsTags ,

Algorithmic Movie (with texture)

We would like to share a new algorithmic movie we have created.

Since the mid 90’s we have been dabbling off and on with a combination of algorithmic and genetic art (see: What is “Genetic Art?” or try running the Java code directly in your browser). Every once in a while we return to the project and generate something we would like to share.

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Posted on Categories History, StatisticsTags , , , , , ,

Deming, Wald and Boyd: cutting through the fog of analytics

This article is a quick appreciation of some of the statistical, analytic and philosphic techniques of Deming, Wald and Boyd. Many of these techniques have become pillars of modern industry through the sciences of statistics and operations research.
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Posted on Categories Coding, Rants, StatisticsTags , , , 10 Comments on R annoyances

R annoyances

Readers returning to our blog will know that Win-Vector LLC is fairly “pro-R.” You can take that to mean “in favor or R” or “professionally using R” (both statements are true). Some days we really don’t feel that way. Continue reading R annoyances

Posted on Categories Coding, Computer Science, RantsTags , , ,

Postel’s Law: Not Sure Who To Be Angry With

One of my research interests is finding the principles that underly the management of information, complexity and uncertainty. When something as simple as a web-form is called “technology” it is time to step back and examine your principles. One principle I am not sure about Postel’s law. It doesn’t hold often enough to be relied on and when it fails I am not sure who to be angry with. Continue reading Postel’s Law: Not Sure Who To Be Angry With

Posted on Categories AdministrativiaTags

Winter 2010 Subscription Campaign

We at Win-Vector LLC would like to invite our loyal readers to help with our Winter 2010 Subscription Campaign. Please encourage your erudite friends and colleagues to read and subscribe to Continue reading Winter 2010 Subscription Campaign

Posted on Categories Finance, Mathematics, TutorialsTags , , ,

“Easy” Portfolio Allocation

This is an elementary mathematical finance article. This means if you know some math (linear algebra, differential calculus) you can find a quick solution to a simple finance question. The topic was inspired by a recent article in The American Mathematical Monthly (Volume 117, Number 1 January 2010, pp. 3-26): “Find Good Bets in the Lottery, and Why You Shouldn’t Take Them” by Aaron Abrams and Skip Garibaldi which said optimal asset allocation is now an undergraduate exercise. That may well be, but there are a lot of people with very deep mathematical backgrounds that have yet to have seen this. We will fill in the details here. The style is terse, but the content should be about what you would expect from one day of lecture in a mathematical finance course.

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Posted on Categories Opinion, Rants, StatisticsTags , , , , 1 Comment on Relative returns: a banker versus trader paradox

Relative returns: a banker versus trader paradox

Quick Joke.

Q: What is the difference between a banker and a trader?
A: A banker will try and tell you a 10% loss followed by a 10% gain is breaking even.

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