2141 search results for "Twitter"

Abstract word clouds using R

August 23, 2010
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Abstract word clouds using R

A recent question over at BioStar asked whether abstracts returned from a PubMed search could easily be visualised as “word clouds”, using Wordle. This got me thinking about ways to solve the problem using R. Here’s my first attempt, which demonstrates some functions from the RCurl and XML packages. update: corrected a couple of copy/paste

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Newcomb, Benford, and their Dirty, Dirty Logarithms

August 22, 2010
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Newcomb, Benford, and their Dirty, Dirty Logarithms

Tom Taverner introduced me to Benford’s Law as we were eating lunch together at a statistical computing conference: If you look at the first digits of data in many naturally-occuring datasets, a startling 30 percent of them are ones. “Pah!” I said. “That belies intuition! Why would one digit occur any more than another? I’d

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Global Temperature Proxy Reconstructions ~ Bayesian extrapolation of warming w/ rjags

August 22, 2010
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Global Temperature Proxy Reconstructions ~ Bayesian extrapolation of warming w/ rjags

Update: fixed projection. There are a bunch of “hockey sticks” that calculate past global temps. through the use of proxies when instrumental data is absent. There is a new one out there by McShane and Wyner (2010) that’s creating quite a stir in the blogosphere (here, here, here, here). The main take out being, that

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Taking R to the Limit, Part II – Large Datasets in R

August 20, 2010
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Taking R to the Limit, Part II – Large Datasets in R

For Part I, Parallelism in R, click here. Tuesday night I again had the opportunity to present on high performance computing in R, at the Los Angeles R Users’ Group. This was the second part of a two part series called “Taking R to the Limit: High Performance Computing in R.” Part II discussed ways to work with large datasets...

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A brief introduction to “apply” in R

August 19, 2010
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A brief introduction to “apply” in R

At any R Q&A site, you’ll frequently see an exchange like this one: Q: How can I use a loop to ? A: Don’t. Use one of the apply functions. So, what are these wondrous apply functions and how do they work? I think the best way to figure out anything in

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Goals per Game in MLS

August 16, 2010
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Goals per Game in MLS

I promised something related to Major League Soccer and here it is.  Caveat:  It’s not much.  Why so sparse?  (1) The data is a bit messy due to teams folding, expansion, name changes, etc.  (2)  I was backpacking all weekend and didn’t have time to work on this side project.  Yes, I have a real

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In case you missed it: July Roundup

August 16, 2010
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In case you missed them, here are some articles from July of particular interest to R users. We reviewed the updates to Hadley Wickham's ggplot2 and plyr packages. We linked to an article about R co-creator Ross Ihaka in New Zealand's Sunday Star Times. We noted that the presentations from the R/Finance 2010 conference are available for download. We...

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GillespieSSA 0.5-4 is released

August 16, 2010
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GillespieSSA 0.5-4 is released

I just uploaded GillespieSSA 0.5-4 to CRAN. It should be  just a matter of days before it has propagated itself across all mirrors. This release consists of minor revisions with no (intended) changes in functionality. The main change (and it is … Continue reading →

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Apologies and Style Guides

August 13, 2010
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Apologies and Style Guides

I have to say that it’s pretty exciting to watch your blog go from a few hits over its lifetime to getting almost 200 in a single day.  I am currently negotiating with Google over the purchase of this blog.  Or maybe not.  Again, thanks be to @revodavid for posting to the Revolution Analytics Blog.

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Scrape Web data using R

August 13, 2010
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Scrape Web data using R

Plenty of people have been scraping data from the web using R for a while now, but I just completed my first project and I wanted to share the code with you.  It was a little hard to work through some of the “issues”, but I had some great help from @DataJunkie on twitter. As

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