Monthly Archives: December 2010

Google Insights and RCurl

December 20, 2010
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Google Insights is nifty. If you’re logged in to your Google account, you can download the results as a CSV file. This is straightforward if you’re using a browser; if you’re trying to retrieve the results of queries using R, however, things get more complicated. The following code retrieves the results of a Google Insights search for...

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How to buy a used car with R (part 2)

December 20, 2010
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How to buy a used car with R (part 2)

Continued from Part 1. Part 2: Digging into the Kelley Blue Book The only thing better than a bit of data is a lot of data. Now that we can grab KBB values for a given trim of a given model in a given year, we set our ambitions higher: automating the collection of these values for...

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Vim plugin for R

December 19, 2010
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Vim plugin for R

Just found a very nice plugin for using R in Vim. It's unbelievable comfortable!

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Principal component analysis to yield curve change

December 19, 2010
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Principal component analysis to yield curve change

In quantitive finance,it is often said that yield curve change is explained by three factor,"parallel shift", "twist" and "butterfly".Because I found that we can get historical yield curve data from FRB's web site, I check whether these proverbial facts are correct or not.Yield curve data can be downloaded to click "Go to download" and "Download File" button. Default data...

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White Bumblebee Implemented in R

December 18, 2010
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White Bumblebee Implemented in R

White Bumblebee is a trade system based on a simple moving average crossover, but with a special twist. Imagine your thermostat triggering your furnace to shut off or turn on every time a temperature crossed a threshold. If the thermostat didn't have a...

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AMIS revised & resubmitted

December 18, 2010
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AMIS revised & resubmitted

After a thorough revision that removed most of the theoretical attempts at improving our understanding of AMIS convergence, we have now resubmitted the AMIS paper to Scandinavian Journal of Statistics and arXived the new version as well. (I remind the reader that AMIS stands for adaptive mixture importance sampling and that it implements an adaptive

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R Workflow: Melbourne R Users Dec 1st 2010

December 18, 2010
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R Workflow: Melbourne R Users Dec 1st 2010

Melbourne R Users Group December 1st 2010 Meeting (Meetup page). 1. “What my R code looks and feels like (Vanilla)” by Geoff Robinson The other talk from the session was by Geoff Robinson who discussed several useful strategies for working … Continue reading →

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Visualizing Facebook Friends: Eye Candy in R

December 18, 2010
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Visualizing Facebook Friends: Eye Candy in R

Earlier this week I published a data visualization on the Facebook Engineering blog which, to my surprise, has received a lot of media covereage. I’ve received a lot comments about the image, many asking for more details on how I … Continue reading →

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ASReml-R: Storing A inverse as a sparse matrix

December 18, 2010
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I was testing ASReml-R program (an R package that links propriety ASReml binaries that can be used only with valid licence) this week and had to do some manipulations with the numerator relationship matrix (A). ASReml-R provides a function (asreml.Ainverse) that can create inverse of A directly from the pedigree as this inverse is needed in pedigree based...

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In The Wild: rApache 1.1.13 in Ubuntu and Source

December 18, 2010
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In The Wild: rApache 1.1.13 in Ubuntu and Source

I rolled a new released eight days ago, but tumblr was down and I forgot to post. Then yesterday I remembered again, but then tumblr was down again. Doh! You can get rApache 1.1.13 from here in source form or learn about how to get it here in binary f...

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