Posts Tagged ‘ Tools ’

You’ve got the whole world in your portfolio

December 29, 2011
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You’ve got the whole world in your portfolio

A famous finance professor once told us that good diversification meant holding everything in the world. Fine, but in what proportion? Suppose you could invest in every country in the world. How much would you invest in each? In a market-capitalization weighted index, you'd invest in each country in proportion to the market value of its investments (its "market capitalization")....

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The ‘R’ in Human [R]esources (or: a very brief introduction to the statistical package ‘R’ for HR)

December 21, 2011
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The ‘R’ in Human [R]esources (or: a very brief introduction to the statistical package ‘R’ for HR)

I studied psychology in Marburg (Germany). At university we exclusively used SPSS. The courses were among my classmates usually not the most popular. After over 10 years in management consulting, I have noticed that little has changed to this. It’s a shame because a lot of interesting data in consulting firms and HR departments remain unused. In my role as managing director of kibit GmbH, I have placed the focus of the company on ”R” … Weiterlesen →

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Keep your files in sync for free

November 19, 2011
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Keep your files in sync for free

It is not uncommon to have two computers at work, four at home and a server out on the wild, wild internet (that's what we have, anyway ... wait, we forgot one in London). How to keep all these files in sync? Here are our file synchronization tips.

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Best graph ever

July 3, 2011
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Best graph ever

Best graph ever. LARGEST EVER DIFFERENCE BETWEEN 328 and 327 SPOTTED IN NEW YORK CITY

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Searching for inaccurate literals in R

May 29, 2011
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Searching for inaccurate literals in R

In creating the numbers tool I wanted to be able to do two things, 1) obtain information about what source did by matching the numeric literals it contained against a database of ‘interesting’ values (now with over 14,000 entries) and 2) flag possible incorrect numeric literals (e.g., 3.1459265 when 3.14159265 had been intended in core/Helix.cpp

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stalkR: R functions for exploring iPhone and iPad (OS X only)

April 21, 2011
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stalkR: R functions for exploring iPhone and iPad (OS X only)

Yesterday Alasdair Allan and Pete Warden shocked the world by revealing that iPhones and iPads have been keeping track of our every move, and saving the data in obfuscated back up files. As my friend Vince Buffalo mentioned on Twitter, part of me was disgusted by the secret stalking Steve Jobs was doing, but my

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EC2 AMI for scientific computing in Python and R

April 11, 2011
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Like many people who crunch numbers frequently, I have increasingly been integrating Amazon’s cloud computing services into my daily workflow. In particular, I have been using their elastic cloud computing (EC2) on a regular basis. The service is an excellent way to offload computationally intensive work from your laptop for literally pennies on the

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Updated infochimps R package, includes several new APIs

March 21, 2011
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Recently, the good folks at Infochimps.com rolled out a series of new APIs to add to their already impressive set of data resources. I have been in a perpetual state of catch-up since the new year, so I have only now got around to adding some of these new APIs to the infochimps R package. Here

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The housing bubble by city

March 17, 2011
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The housing bubble by city

The housing bubble by city. Miami sailed high and fell far. Detroit rose modestly and but dropped more than it went up. Dallas held steady. DC is enjoying a bit of renewed growth, but are in and New York yet to fall?

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Area plots unmasked

December 15, 2010
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Area plots unmasked

RESULTS OF THE GREAT AREA PLOT QUIZ If you are the type of reader who remembers things from last week, you may remember the great area plot quiz we had running. This week, we are excited to announce that the results are in. The plot above shows answers to the four questions. The correct answers

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