R

Blogs on the R software.

Exploration of Letter Make Up of English Words

October 31, 2014
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Exploration of Letter Make Up of English Words

This blog post will do a quick exploration of the grapheme make up of words in the English. Specifically we will use R and the qdap package to answer 3 questions: What is the distribution of word lengths (number of … Continue reading →

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Gaze-cueing and trustworthiness: New paper + raw data + R script on OSF

October 30, 2014
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Recently, a student of mine (Felix Süßenbach, now at the University of Edinburgh) and I published a little study on gaze-cueing, and how it is moderated by the trustworthiness of the gazing person. In a nutshell, although instructed to ignore the gaz...

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reliable ABC model choice via random forests

October 28, 2014
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reliable ABC model choice via random forests

After a somewhat prolonged labour (!), we have at last completed our paper on ABC model choice with random forests and submitted it to PNAS for possible publication. While the paper is entirely methodological, the primary domain of application of ABC model choice methods remains population genetics and the diffusion of this new methodology to […]

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It is the small data that matters the most

October 28, 2014
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It is the small data that matters the most

Everyone is talking about Big Data1, but it is the small data that is holding everything together. The small slowly changing reference tables are the linchpins. Unfortunately, too often politics gets in the way as those small tables, maintained by huma...

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ALUES: Agricultural Land Use Evaluation System, R package

October 26, 2014
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Authors:Arnold R. Salvacion                                     &nb...

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Tuning Laplaces Demon III

October 26, 2014
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Tuning Laplaces Demon III

This is the third post with LaplacesDemon tuning. same problem, different algorithms. For introduction and other code see this post. The current post takes algorithms Independence Metropolis to Reflective Slice Sampler.Independence MetropolisIndependen...

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Call for participation: AusDM 2014, Brisbane, 27-28 November

October 25, 2014
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Call for participation: AusDM 2014, Brisbane, 27-28 November

********************************************************* 12th Australasian Data Mining Conference (AusDM 2014) Brisbane, Australia 27-28 November 2014 http://ausdm14.ausdm.org/ ********************************************************* The Australasian Data Mining Conference has established itself as the premier Australasian meeting for both practitioners and researchers in data mining. Since AusDM’02 the conference … Continue reading →

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Feller’s shoes and Rasmus’ socks [well, Karl's actually...]

October 23, 2014
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Feller’s shoes and Rasmus’ socks [well, Karl's actually...]

Yesterday, Rasmus Bååth [of puppies' fame!] posted a very nice blog using ABC to derive the posterior distribution of the total number of socks in the laundry when only pulling out orphan socks and no pair at all in the first eleven draws. Maybe not the most pressing issue for Bayesian inference in the era […]

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Why is my OS X Yosemite install taking so long?: an analysis

October 23, 2014
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Why is my OS X Yosemite install taking so long?: an analysis

Why? Since the latest Mac OS X update, 10.10 "Yosemite", was released last Thursday, there have been complaints springing up online of the progress bar woefully underestimating the actual time to complete installation. More specifically, it appeared as if, for a certain group of people (myself included), the installer would stall out at "two minutes »more

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Example 2014.12: Changing repeated measures data from wide to narrow format

October 21, 2014
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Example 2014.12: Changing repeated measures data from wide to narrow format

Data with repeated measures often come to us in the "wide" format, as shown below for the HELP data set we use in our book. Here we show just an ID, the CESD depression measure from four follow-up assessments, plus the baseline CESD. Obs ID CESD...

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