Monthly Archives: April 2012

Marketing optimization with LityxIQ

April 3, 2012
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Marketing is one of the pioneering domains when it comes to applications of predictive analytics to Big Data. (For example, how Target used statistical modeling to predict demographic attribues of customers, like pregnancy, to target coupons.) To get such powerful insights into the hands of marketers, DC-area company LityxIQ provides a cloud-based solution: LityxIQ, "an integrated hosted analytics platform...

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Transaction Cost and Execution Price functionality in the Backtesting library in the Systematic Investor Toolbox

April 2, 2012
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Transaction Cost and Execution Price functionality in the Backtesting library in the Systematic Investor Toolbox

I want to introduce the Transaction Cost and Execution Price functionality in the Backtesting library in the Systematic Investor Toolbox. The Transaction Cost is implemented by a commission parameter in the bt.run() function. You may specify the commissions in $ per share for “share” type backtest and as a percentage of total trade for “weight”

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how to use the ifelse function in r

April 2, 2012
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(This article was first published on twotorials by anthony damico, and kindly contributed to R-bloggers) To leave a comment for the author, please follow the link and comment on his blog: twotorials by anthony damico. R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL,...

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how to access different records within a data frame by using logical tests in r

April 2, 2012
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(This article was first published on twotorials by anthony damico, and kindly contributed to R-bloggers) To leave a comment for the author, please follow the link and comment on his blog: twotorials by anthony damico. R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL,...

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Radical Education Reform? Think Bigger.

April 2, 2012
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“My job is to teach you how to think.” –Hugh Young A few days ago John Naughton published an article summarizing his manifesto on how to reform computer science education. I agree computer science education is in need of drastic...

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Exploring Pollen Data

April 2, 2012
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Exploring Pollen Data

I wrote a few functions to grab data and from the Global Pollen Database: source("~/code/_Pollen/pollendatafuntions.R") ## Loading required package: stratigraph ## Loading required package: grid ## Loading required package: graphics ## Loading required package: stats billys <- getpctAP("billys", plot = TRUE) ## Number of taxa: 105 ## Number of levels: 77Arboreal Pollen over time at Billy’s...</p><p><a href=Read more »

Web-Scraping in R

April 2, 2012
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Web-Scraping in R

Web-scraping, or web-crawling, sounds like a seedy activity worthy of an Interpol investigative department. The reality, however, is far less nefarious. Web-scraping is any procedure by which someone extracts data from the internet. Given that it’s possible to get the internet on computers these days; web-scrapping opens an array of interesting possibilities to social-science researchers

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An unabashedly narcissistic data analysis of my own tweets. The…

April 2, 2012
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An unabashedly narcissistic data analysis of my own tweets.
The…

pie( table( whence.i.tweet )) qplot( whence ) + coord_polar() pie( log( table( whence )))+RColorBrewer ggplot (see below) plot( density( tweets.len )) qplot(... stat="density") + geom_density qplot(...stat="bin") + geom_text(...) tweeple tweep...

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Working with Globcolour data

April 2, 2012
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Working with Globcolour data

The Globcolour project (http://www.globcolour.info/) provides relatively easy access to ocean color remote sensing data. Data is provided at http://hermes.acri.fr/and the following parameters are available:· Chlorophyll-a (CHL1 and CHL2)· Fully normalised water leaving radiances at 412, 443, 490, 510, 531, 550-565, 620, 665-670, 681 and 709 nm (Lxxx)· Coloured dissolved and detrital...

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Introduction to ORE Embedded R Script Execution

April 2, 2012
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Introduction to ORE Embedded R Script Execution

This Oracle R Enterprise (ORE) tutorial, on embedded R execution, is the third in a series to help users get started using ORE. See these links for the first tutorial on the transparency layer and second tutorial on the statistics engine. Oracle R Enterprise is a component in the Oracle Advanced Analytics Option of Oracle Database Enterprise...

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