Thanks to everyone who attended yesterday's webinar, "Portfolio design, optimization and stability analysis", presented by Diethelm Würtz of the Rmetrics Association and sponsored by Revolution Analytics, Sybase, Finance Online and NeuralTechSoft. (And thanks in particular for your patience for the last start -- in a perfect demonstration of Murphy's ... [Read more...]

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In this post I offer an alternative function for boxplot, which will enable you to label outlier observations while handling complex uses of boxplot. [Read more...]

Details of the inaugural ZurichR and GenevaR meetings are as follows: [Read more...]

This short post is to share an R tip Pierre recently gave me. When you need to store values sequentially (typically inside a loop), it’s more far efficient to create the whole vector (or matrix) and to fill it, rather than to concatenate the values to your current vector (... [Read more...]

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The Twin Cities R User Group has been around for a little while, but has just launched a new site at meetup.com. Their next meeting will be on February 16, where Erik Iverson will be giving a talk on using R to generate dynamic statistical reports using R's literate programming ... [Read more...]

Stata's new "margins" command is as powerful as "Zelig" package for R for the purpose of conducting post-estimation manipulation of the results (e.g. producing predicted probabilities, confidence intervals, etc.). While "margins" uses delta method, "Ze... [Read more...]

[This article was first published on Rmetrics blogs, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share your [Read more...]

Over the past year, Revolution Analytics has sponsored a number of local R user groups, and we've been thrilled to see the enthusiasm with which R users are coming together. This year, we decided to expand and formalize our sponsorship program, so that any local R user group, whether just ... [Read more...]

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First off, I'll say it's been a whirlwind of a past few days. Thanks to David Smith at the Revolutions Blog for his kind words about the sab-R-metrics series and link back this way. Add in Ed Kupfer's posts at the APBRmetrics board, Harry Pavlidis at THT, Dave Allen at ... [Read more...]

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[This article was first published on Rmetrics blogs, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share your [Read more...]

odfWeave is a great tool for your reproducible research workflow, using R to produce reproducible OpenOffice reports. But a few pieces are lacking. – It is a bit of a drag, every time you want to make a pdf, to have to find and open yo... [Read more...]

Simple root finding and one dimensional integrals algorithms were implemented in previous posts. These algorithms can be used to estimate the cumulative probabilities and quantiles. Here, take normal distribution as an example. Read More: 281 Words Totally [Read more...]

What happens when you mash together R‘s data crunching magic, Festival‘s speech synthesis power, and the audio wonders of the venerable music language Csound? You fall even more in love with free and open-source software, and you start hearing sounds like this: A single beat of the above ... [Read more...]

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Want to keep up-to-date on the latest R packages released to CRAN? Dirk Eddelbuettel's CRANberries service now tweets the release of new R packages to @CRANberriesFeed, so all you need to do is follow that user on Twitter. R hackers may also be interested to see how this Twitter feed ... [Read more...]

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