Aggregate electoral targeting is the process of determining the likely hood of a citizen choosing to vote turnout), and which candidate that person is most likely to vote for (partisan bias) in a given race using historical turnout and partisan bias. The output from this targeting allows a campaign to ... [Read more...]

David@Work blog shows how to fill in the area between two crossing lines in an Excel chart. This post was also published as a guest-post on PTS blog. Let’s try to replicate this graph in ggplot2. First, load ggplot2 and generate the data frame to be used in ... [Read more...]

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Gerhard Niehaus Algorithmic Composition: Paradigms of Automated Music Generation by Gerhard Nierhaus Iannis Xenakis Formalized Music by Iannis Xenakis Music and Architecture: Architectural Projects, Texts, and Realizations by Iannis Xenakis Harry Partc... [Read more...]

topsyWidgetPreload({ "url": "http%3A%2F%2Fborasky-research.net%2F2009%2F10%2F20%2Fthe-geese-are-migrating-and-so-have-i%2F", "style": "big", "title": "The geese are migrating, and so have I" }); As someone wiser than I once said, “It’s fall – time to roast footballs and play touch marshmallow.” Or something like that. It’s the time of ... [Read more...]

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I love R because there are always exciting new packages which can be far beyond your imagination. Here I’d like to introduce a couple of packages that look really awesome: 1. swfDevice: R graphics device for SWF output (by Cameron Bracken) This package is still at a pre-alpha stage but ... [Read more...]

A quick bug fix released of RPostgreSQL was uploaded to CRAN earlier today; it updates last week's 0.1-5 release. An editing error left one of the helper functions broken. I also updated a few of the test scripts to also allow for optional environmen... [Read more...]

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The GenEstim function presented here uses a very simple genetic algorithm to estimate parameters. The function returns the best estimated set of parameters ($estim), the AIC ($information) at each generation, and the cost of the best model ($bestcost) at each generation. Results of running the program with a logistic function : ... [Read more...]

Another trio concert at CSO, but very different from the most recent classic piano trio. Tonight was once again a chance to see Dianne Reeves (wikipedia) but this time accompanied simply by two guitarists: Russell Malone and Romero Lubambo (wikipedia). Given that Dianne Reeves (who we had seen in just ... [Read more...]

After introducing a colleague to the wonders of Dropbox today (more on that later) I realized that it might be useful to put out a list of software that is of use to graduate students. I often find that many of the software products I find indispensable are virtually unknown ... [Read more...]

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A quick workaround to have a filled.contour plot with natural log10-log10 scale (instead of the default natural log scale) plotmat [Read more...]

October 2009 Open Data Group has launched a changed detection project on Google Code, http://code.google.com/p/change-detection/. This is an introduction and demonstration of using open source software and the Data Mining Group’s Predictive Model Markup Language (PMML) standard to perform data analytics.  Specifically, we show how ... [Read more...]

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