Monthly Archives: March 2012

help resources for r: the r-help mailing list, ucla academic technology services, and r-bloggers

March 26, 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 use coercion and convert numbers to characters to logicals in r

March 26, 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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VIDEO: Applying "SNV" math-treatment to our raw spectra in "R".

March 26, 2012
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VIDEO: Applying "SNV" math-treatment to our raw spectra in "R".

(This article was first published on NIR-Quimiometría, and kindly contributed to R-bloggers) To leave a comment for the author, please follow the link and comment on his blog: NIR-Quimiometría. 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, Eclipse, git, hadoop, Web Scraping) statistics...

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Google summer of code 2012 – and R – a call for students

March 26, 2012
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Google summer of code 2012 – and R – a call for students

Google has again accepted R as a mentoring organization for Google Summer of Code. R has successfully participated in GSoC in multiple previous years, and is excited to be returning this year as a mentoring organization. In a nutshell:  If you are a student looking to write some code for the R community, Google is willing to pay you...

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Julia functions for the Rmath library

March 26, 2012
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1.1 Signatures of the d-p-q-r functions in libRmath Users of R are familiar with the functions for evaluating properties of and for sampling from probability distributions, the so-called d-p-q-r functions. The designation d-p-q-r reflects the fact t...

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How to customize ggplot2 graphics

March 26, 2012
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How to customize ggplot2 graphics

I consider ggplot2 to be nothing short of a revolution in R graphics. I simply haven't found anything like this package for quickly and elegantly producing usable graphics.  I covered the quick and dirty basics of ggplot2 in a previous post. Now I...

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How to Extract Citation from a Body of Text

March 26, 2012
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How to Extract Citation from a Body of Text

Say, you have a text and you want to retrieve the cited names and years of publication. You wouldn't want to this by hand, wouldn't you?Try the following approach:(the text sample comes from THIS freely available publication)library(stringr)(txt <- ...

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Beta is not volatility

March 26, 2012
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Beta is not volatility

The missing link between beta and volatility is correlation. Previously “4 and a half myths about beta in finance” attempted to dislodge several myths about beta, including that beta is about volatility. “Low (and high) volatility strategy effects” showed a plot of beta versus volatility for stocks in the S&P 500 for estimates from 2006.  … Continue reading...

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Reminder: Kölner R User Group meets on 30 March 2012

March 26, 2012
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Reminder: Kölner R User Group meets on 30 March 2012

Venue: Sion em Keldenich, Weyertal 47, 50937 Cologne, Germany, 6 p.m., 30 March 2012, View Larger MapFor more details and registration see the Kölner R User Group page.

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R functions for serious stats

March 25, 2012
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R functions for serious stats

UPDATE: Some problems arose with my previous host so I have now updated the links here and elsewhere on the blog. The companion web site for Serious Stats has a zip file with R scripts for each chapter. This contains examples of R code and and all my functions from the book (and a few extras).

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