Monthly Archives: May 2012

Portfolio diversity

May 7, 2012
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Portfolio diversity

How many baskets are your eggs in? Meucci diversity Attilio Meucci directly addresses the adage: Don’t put all your eggs in one basket. His idea is to think of your portfolio as a set of  subportfolios that are each uncorrelated with the rest.  If your portfolio can be configured to have a lot of roughly … Continue reading...

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Kurtosis Interpretation

May 7, 2012
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When you google “Kurtosis”, you encounter many formulas to help you calculate it, talk about how this measure is used to evaluate the “peakedness” of your data, maybe some other measures to help you do so, maybe all of a … Continue reading →No related posts.

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playitbyr 0.2-1: data through sound, now with layers, facets, and more pleasure

May 6, 2012
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The recent Sonification Handbook has a chapter devoted to exploratory data analysis using sound. With some help from Sam Ferguson, one of the chapter's authors, I've made it easy to implement those techniques using R with playitbyr.

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clusterProfiler: an R Package for Comparing Biological Themes Among Gene Clusters

May 6, 2012
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Increasing quantitative data generated from transcriptomics and proteomics require integrative strategies for analysis. Here, we present an R package, clusterProfiler that automates the process of biological-term classification and the enrichment analysis of gene clusters. The analysis module and visualization module were combined into a reusable workflow. Currently,...

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ninety two-minute r tutorial videos

May 6, 2012
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ninety two-minute r tutorial videos now posted.  three hours of ultra-concentrated r.new videos include topics like:setting your preferences (options) (Rprofile.site) random number generation (runif) (rnorm) (set.seed) (rbinom)creating and accessi...

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Online resources for handling big data and parallel computing in R

May 6, 2012
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Online resources for handling big data and parallel computing in R

by Yanchang Zhao, RDataMining.com Compared with many other programming languages, such as C/C++ and Java, R is less efficient and consumes much more memory. Fortunately, there are some packages that enables parallel computing in R and also packages for processing … Continue reading →

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Improving script_001: “Monitor”

May 6, 2012
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Improving script_001: “Monitor”

After having a look to this video: http://www.screenr.com/UxH8 from rtwotutorials, and reading some tutorials, I decided to modified the script from the previous post: Practicing Script with “ R”: Monitor , in order to make it more r...

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I’ve Converted to R Full-Time

May 6, 2012
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It's been over four years that I've been using both R and Stata, but as of last week I've become an R convert. For several years I had conducted statistical analyses in R (since many complex models can only be programmed in R), but I used Stata before ...

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reshape (from base) Explained: Part II

May 5, 2012
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reshape (from base) Explained: Part II

Part II Explains More Complex  Wide to Long With base reshape  In part I of this base reshape tutorial we went over the basics of reshaping data with reshape.  We learned two rules that help us to be more efficient … Continue reading →

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RcppArmadillo 0.3.0.3

Two days ago, Conrad Sanderson released another bug-fix version 3.0.3 for the 3.0.0 branch of his excellent Armadillo C++ template library for linear algebra. The new RcppArmadillo release 0.3.0.3 which contains it appeared on CRAN yesterday. Beside ...

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