Monthly Archives: May 2011

R / Finance 2011 presentations

I just sent the text below to the r-sig-finance list: The organizing committee for the R/Finance 2011 conference is pleased to announce the availability of presentation slides from the 3rd annual R/Finance conference. This year's two-day conference...

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Eigen-who? How Can I Write About Eigen-anything and Expect You to Read?

May 25, 2011
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Eigen-who? How Can I Write About Eigen-anything and Expect You to Read?

After the very nice Convore reply @timelyportfolio some of your posts include "eigenvalue ratio plots" -- kindly tell us what they show and how they might be useful in constructing a portfolio. I felt like I should at least attempt to offer a little m...

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sab-R-metrics: Kernel Density Smoothing

May 25, 2011
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sab-R-metrics: Kernel Density Smoothing

Last time I left you, I had gone over some basics of doing loess regression in R. If you remember, loess is a sort of regression that allows wigglyness in your regression of some dependent variable Y on some independent variable X (I will generalize t...

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Getting Started with Some Baseball Data

May 24, 2011
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With all of the discussions (hype?) regarding applied statistics, machine learning, and data science, I have been looking for a go-to source of data unrelated to my day-to-day work. I loved baseball as a kid. I love baseball now. I love baseball stats....

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Utility Spread and Financial Turbulence Part 2 with Utility Slope

May 24, 2011
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Utility Spread and Financial Turbulence Part 2 with Utility Slope

THIS IS NOT INVESTMENT ADVICE.  YOU ARE RESPONSIBLE FOR YOUR OWN GAINS AND LOSSES. I did not intend for this to be a two-part series but I just could not be complacent with Utility Spread and Financial Turbulence (for avid readers, there was a sm...

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A simple Big Data analysis using the RevoScaleR package in Revolution R

May 24, 2011
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A simple Big Data analysis using the RevoScaleR package in Revolution R

This post from Stephen Weller is part of a series from members of the Revolution Analytics Engineering team. Learn more about the RevoScaleR package, available free to academics as part of Revolution R Enterprise — ed. The RevoScaleR package, installed with Revolution R Enterprise, offers parallel external memory algorithms that help R break through memory and performance limitations. RevoScaleR...

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R, JAGS and ggplot2

May 24, 2011
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R, JAGS and ggplot2

Last week a question was asked on the ggplot2 list about using ggplot2 and jags in R (). Here’s what was my answer (a bit updated): Using as an example the school dataset from R2WinBUGS package: Than you can use the mcmcplots package which give a “feel” of ggplot2: If you really want to use

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Terrain Classification Experiment 2: GRASS, R, and the raster package

May 24, 2011
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Terrain Classification Experiment 2: GRASS, R, and the raster package

Quick post on terrain classification, based on some trouble folks were having with a previous example on Windows. With the spgrass6 package, raster stacks are created by loading several GRASS files at once: x <- readRAST6(vname=c('beam_sum_m...

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KDnuggets: R used in 1 in 4 analytics projects

May 24, 2011
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The most recent KDnuggets poll asked, "Which data mining/analytic tools you used in the past 12 months for a real project". Amongst all commercial and open-source tools, open-source R was the second most-frequently cited, by 23.3% or about 1 in 4 respondents. (The most frequent was the open-source data mining tool, RapidMiner.) See the full poll results at the...

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