2148 search results for "MAP"

Chromosome bias in R, my notebook

December 23, 2010
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Chromosome bias in R, my notebook

My goal is to develop a means of detecting chromosome bias from a human BAM file.Because I've been working with proprietary and novel plant genomes for the last three years, I haven't had the chance to use any of the awesome UCSC-based annotational features that have been introduced and refined in Bioconductor until now. I've returned to biomedical research...

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Did you feel that?

December 23, 2010
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Did you feel that?

There was a small earthquake in northern England on Tuesday. Barry Rowlingson felt the quake (it rattled the photographs on his wall), but didn't know how big of a quake it was because he didn't know how close he was to the epicentre. The British Geological Survey hadn't yet announced the quake, but did give access to seismograph readings,...

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How Orbitz uses Hadoop and R to optimize hotel search

December 21, 2010
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How Orbitz uses Hadoop and R to optimize hotel search

Positional bias — the tendency for users to preferentially select results in the first few positions of a search — is a big issue for all kinds of search engines. But for online travel site Orbitz the stakes are higher than for a traditional Web search engine: if a customer chooses the first-listed hotel in a search for accommodations,...

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Michael Kane on Bigmemory

December 20, 2010
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Michael Kane on Bigmemory

Handling big data sets has always been a concern for R users. Once the size of the data set reaches above 50% of RAM, it is considered “massive” and can literally become impossible to work with on a standard machine. The bigmemory project, by Michael Kane and Jay Emerson, is one approach to dealing with

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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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Joe West vs. Bruce Froemming: A Crude Umpire LHB/RHB Bias Comparison

December 17, 2010
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Joe West vs. Bruce Froemming: A Crude Umpire LHB/RHB Bias Comparison

In my last two posts, I have tinkered with the 'gam' package to create heat maps for individual umpire strike zones. I went ahead and grabbed Joe West's data (which has a lot more pitches than Bruce Froemming in it, since Froemming's data is only from...

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Facebook’s Social Network Graph

December 14, 2010
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Facebook’s Social Network Graph

Paul Butler, an intern on Facebook’s data infrastructure engineering team, was interested in visualizing the "locality of friendship". Luckily, he has some great data to work with: Facebook's social network of the friendships between its 500 million members. But visualizing that much data can be a challenge in its own right -- it takes skill to draw meaning from...

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Ghcn V3 Metadata improvements

December 12, 2010
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Ghcn V3 Metadata improvements

The Global Historical Climate Network  (GHCN) is in it’s beta stage. On of the stated goals of the project is to improve the metadata that is provided for the station data.  Over the past few months several independent volunteers have been focusing on the issue of station metadata, each with their own focus. Ron Broberg

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Visualizing Agricultural Subsidies by Kentucky County

December 12, 2010
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Visualizing Agricultural Subsidies by Kentucky County

In this post,  I provide results from my first full blown application of R to read, merge, clean, subset, manipulate, analyze and visualize data related to agricultural subsidies by Kentucky counties. This is very similar to the work I do on a daily basis, and was a great test of the capabilities of doing these tasks open source...

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R with Vim on Mac OS X

December 12, 2010
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R with Vim on Mac OS X

The built-in script editor for the Mac OS X R GUI actually isn’t bad. In fact it is much better than its Window’s counterpart. In particular, it has: Syntax highlighting Auto-completion Bracket matching Auto-indent Block code execution (with blocked command history) However, when coding in R and pretty much any other language, Vim has always

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