Blog Archives

When R, or any other language, is not enough

December 14, 2012
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When R, or any other language, is not enough

This post is tangential to R, although R has a fair share of the issues I mention here, which include research reproducibility, open source, paying for software, multiple languages, salt and pepper. There is an increasing interest in the reproducibility … Continue reading →

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R pitfalls #4: redefining the basics

December 13, 2012
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R pitfalls #4: redefining the basics

I try to be economical when writing code; for example, I tend to use single quotes over double quotes for characters because it saves me one keystroke. One area where I don’t do that is when typing TRUE and FALSE … Continue reading →

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Multisite, multivariate genetic analysis: simulation and analysis

December 13, 2012
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Multisite, multivariate genetic analysis: simulation and analysis

The email wasn’t a challenge but a simple question: Is it possible to run a multivariate analysis in multiple sites? I was going to answer yes, of course, and leave it there but it would be a cruel, non-satisfying answer. … Continue reading →

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More sense of random effects

November 17, 2012
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More sense of random effects

I can’t exactly remember how I arrived to Making sense of random effects, a good post in the Distributed Ecology blog (go over there and read it). Incidentally, my working theory is that I follow Scott Chamberlain (@recology_), who follows … Continue reading →

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Overlay of design matrices in genetic analysis

October 12, 2012
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Overlay of design matrices in genetic analysis

I’ve ignored my quantitative geneticist side of things for a while (at least in this blog) so this time I’ll cover some code I was exchanging with a couple of colleagues who work for other organizations. It is common to … Continue reading →

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Scraping pages and downloading files using R

October 1, 2012
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Scraping pages and downloading files using R

I have written a few posts discussing descriptive analyses of evaluation of National Standards for New Zealand primary schools.The data for roughly half of the schools was made available by the media, but the full version of the dataset is … Continue reading →

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Some regressions on school data

September 26, 2012
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Some regressions on school data

Eric and I have been exchanging emails about potential analyses for the school data and he published a first draft model in Offsetting Behaviour. I have kept on doing mostly data exploration while we get a definitive full dataset, and … Continue reading →

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New Zealand school performance: beyond the headlines

September 24, 2012
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New Zealand school performance: beyond the headlines

I like the idea of having data on school performance, not to directly rank schools—hard, to say the least, at this stage—but because we can start having a look at the factors influencing test results. I imagine the opportunity in … Continue reading →

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(Unsurprisingly) users default to the defaults

September 19, 2012
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(Unsurprisingly) users default to the defaults

Oddities tend to jump out when one uses software in a daily basis. The situation is even clearer when using software for teaching: many more people looking at it with fresh eyes. Let’s say that we are fitting a simple … Continue reading →

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Mid-September flotsam

September 14, 2012
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Mid-September flotsam

This is one of those times of the year: struggling to keep the head above the water, roughly one month before the last lecture of the semester. On top trying to squeeze trips, meetings and presentations in between while dealing … Continue reading →

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