1786 search results for "ggplot2"

K-Means Clustering on Big Data

June 7, 2011
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K-Means Clustering on Big Data

In this post Joseph Rickert demonstrates how to build a classification model on a large data set with the RevoScaleR package. A script file for use with Revolution R Enterprise to recreate the analysis below is at the end of the post, and can also be downloaded here -- ed. The k-means (Lloyd) algorithm, an intuitive way to explore...

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The residuals of crime

June 3, 2011
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The residuals of crime

Real-estate search website Trulia has a new tool to help you in your choice of a new home: crime maps. With local police forces being much better about sharing data crime maps are nothing new, but Trulia takes it to the next level with a slick user interface for navigating US cities, a beautiful heat-map visualization of crime hot-spots...

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Annual Returns by State of the US Economy

June 1, 2011
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Annual Returns by State of the US Economy

Sometimes it is fun to just look at annual returns, especially as the financial world has shifted its focus to microseconds in a world of inconceivable macro imbalances.  St. Louis Fed (USREC) offers a binary state of the economy with 1=recession ...

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Overoptimizing Chicago Fed

May 31, 2011
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Overoptimizing Chicago Fed

THIS SHOULD BE OBVIOUS THROUGHOUT THE POST BUT THIS IS NOT INVESTMENT ADVICE.  PLEASE DO NOT FOLLOW THIS SYSTEM AS IT COULD RESULT IN SERIOUS LOSSES. One of the perils of system-building is the tendency to unintentionally overoptimize by playing/r...

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More St. Louis Fred Fun with National Financial Conditions

May 30, 2011
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More St. Louis Fred Fun with National Financial Conditions

I owe someone at the Fed a beer for all the recent additions at http://research.stlouisfed.org/fred2/.  I have covered some in Spreads and Stress and Gifts from BAC ML and the Federal Reserve.  The newest addition 8 Chicago Fed Indexes Added ...

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R for the web

May 27, 2011
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There is a nice R module for apache: rApache. So you can easily publish statistics.

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New online R courses from Statistics.com

May 26, 2011
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Online training provider Statistics.com has introduced a couple of new R-related courses which are well worth checking out. These are all self-paced on-line courses, with materials by and interactive feedback from leading R gurus. Current R users looking to take their programming skills to the next level will be particularly interested in the Advanced Programming in R course from...

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Long XLU Short SPY

May 20, 2011
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Long XLU Short SPY

THIS IS NOT INVESTMENT ADVICE.  YOU ARE RESPONSIBLE FOR YOUR OWN GAINS AND LOSSES. I spend my days and nights wondering what a bond manager should do if he/she doesn’t like bonds, but also cannot sit in 0% cash.  I generally dislike spreads...

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Spreads and Stress

May 20, 2011
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Spreads and Stress

Since we have the Gifts from BAC ML and the Federal Reserve, I thought I should look at another interesting element of bonds.  Bond spreads act as a very strong symbol of financial stability and confidence.  The St. Louis Fed Stress Index is ...

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[Project Euler] – Problem 57

May 19, 2011
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It is possible to show that the square root of two can be expressed as an infinite continued fraction. √ 2 = 1 + 1/(2 + 1/(2 + 1/(2 + … ))) = 1.414213… By expanding this for the first four iterations, we get: Read More: 547 Words Totally

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