Monthly Archives: May 2012

A sociologist converts from Stata to R

May 7, 2012
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Ph.D candidate in sociology Ethan Fosse just switched from Stata to doing 100% of his analysis with R. His reasons? If you want to do Bayesian analysis or graph modeled coefficients (or work with complex data structures more generally), then R is much easier than Stata due to the object-oriented programming environment. It's unbelievably liberating to be able to...

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“Introduction to R” public course

May 7, 2012
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Milano R net, in collaboration with Quantide, organizes a public course of introduction to R. When: June 7-8, 2012 Where: Hotel Michelangelo; Milano (near Central Railway Station) Further details

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Example 9.30: addressing multiple comparisons

May 7, 2012
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Example 9.30: addressing multiple comparisons

We've been more sensitive to accounting for multiple comparisons recently, in part due to work that Nick and colleagues published on the topic. In this entry, we consider results from a randomized trial (Kypri et al., 2009) to reduce problem drinking ...

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Second Milano R net meeting to be held in September 27, 2012

May 7, 2012
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We are organising the second Milano R net meeting in September 27, 2012.

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Bivariate linear mixed models using ASReml-R with multiple cores

May 7, 2012
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Bivariate linear mixed models using ASReml-R with multiple cores

A while ago I wanted to run a quantitative genetic analysis where the performance of genotypes in each site was considered as a different trait. If you think about it, with 70 sites and thousands of genotypes one is trying … Continue reading →

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PubMed publications in 2011 by 202 world countries: who’s the winner?

May 7, 2012
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PubMed publications in 2011 by 202 world countries: who’s the winner?

Which country had the most PubMed citations in 2011? To find out I used R statistical software to analyze the affiliation of 986 427 articles.

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Waterfall charts in style of The Economist with R

May 7, 2012
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Waterfall charts in style of The Economist with R

Waterfall charts are sometimes quite helpful to illustrate the various moving parts in financial data, in particular where I have positive and negative values like a profit and loss statement (P&L). However, they can be a bit of a pain to produce in Ex...

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Presentations of the first Milano R net meeting

May 7, 2012
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Welcome presentation Andrea Spanò, Partner at Quantide (download PDF, 0.2 MB) Past, present and future of R Stefano Iacus, Department of Economics, Business and Statistics, University of Milan and R Development Core Team (download PDF, 7.3 MB) R and Operational … Continue reading →

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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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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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