2121 search results for "twitter"

R programming books (updated)

January 28, 2011
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R programming books (updated)

In a recent post, I asked for suggestions for introductory R computing books. In particular, I was looking for books that: Assume no prior knowledge of programming. Assume very little knowledge of statistics. For example, no regression. Are cheap, since they are for undergraduate students. Some of my cons aren’t really downsides as such. Rather,

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ABC model choice not to be trusted [2]

January 27, 2011
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ABC model choice not to be trusted [2]

As we were completing our arXiv summary about ABC model choice, we were helpfully pointed to a recent CRiSM tech. report by X. Didelot, R. Everitt, A. Johansen and D. Lawson on  Likelihood-free estimation of model evidence. This paper is quite related to our study of the performances of the ABC approximation to the Bayes

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Building a Better Word Cloud

January 27, 2011
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Building a Better Word Cloud

A few weeks ago I attended the NYC Data Visualization and Infographics meetup, which included a talk by Junk Charts blogger Kaiser Fung. Given the topic of his blog, I was a bit shocked that the central theme of his talk was comparing good and bad word clouds. He even stated that the

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Speed up your R code

January 26, 2011
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Speed up your R code

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 (or matrix). In terms of allocation

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ABC model choice not to be trusted

January 26, 2011
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ABC model choice not to be trusted

This may sound like a paradoxical title given my recent production in this area of ABC approximations, especially after the disputes with Alan Templeton, but I have come to the conclusion that ABC approximations to the Bayes factor are not to be trusted. When working one afternoon in Park City with Jean-Michel and Natesh Pillai

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sab-R-metrics: Intermediate Scatter Plots

January 25, 2011
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sab-R-metrics: Intermediate Scatter Plots

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 Fangraphs...

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sab-R-metrics: Intermediate Scatter Plots

January 25, 2011
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sab-R-metrics: Intermediate Scatter Plots

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 Fangraphs...

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CPU and GPU trends over time

January 25, 2011
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CPU and GPU trends over time

GPUs seem to be all the rage these days. At the last Bayesian Valencia meeting, Chris Holmes gave a nice talk on how GPUs could be leveraged for statistical computing. Recently Christian Robert arXived a paper with parallel computing firmly in mind. In two weeks time I’m giving an internal seminar on using GPUs for

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Listening for trends in US baby names over 130 years

January 25, 2011
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Listening for trends in US baby names over 130 years

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 sound represents the top 1000 baby names

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CRANberries is now tweeting

January 23, 2011
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The CRANberries service (which reports on new and updated CRAN packages for the R language and environment) is now tweeting about new packages. Simply follow @CRANberriesFeed to receive theses messages. For the technically minded, adding this to the...

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