Monthly Archives: May 2013

The heat is on…. or is it? Trend Analysis of Toronto Climate Data

May 27, 2013
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The heat is on…. or is it? Trend Analysis of Toronto Climate Data

The following is a guest post from Joel Harrrison, PhD, consulting Aquatic Scientist.For a luddite like me, this is a big step – posting something on the inter-web.  I’m not on Facebook.  I don’t know what Twitter is.  Hell, I don’t even own a smartphone.  But, I’ve been a devoted follower of Myles’ blog for some time,...

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Updates to the Social Science Starter Kit

May 27, 2013
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The Emacs Social Science Starter Kit is a drop-in collection of packages and settings for Emacs 24 aimed at people like me: that is, people doing social science data analysis and writing, using some combination of tools like R, git, LaTeX, Pandoc, perh...

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Writing a Minimal Working Example (MWE) in R

May 27, 2013
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Writing a Minimal Working Example (MWE) in R

How to Ask for Help using R How to Ask for Help using R The key to getting good help with an R problem is to provide a minimally working reproducible example (MWRE). Making an MWRE is really easy with R, and it will help ensure that...

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Bayesian model II regression

May 27, 2013
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Bayesian model II regression

Regression is a mainstay of ecological and evolutionary data analysis. For example, a disease ecologist may use body size (e.g. a weight from a scale with measurement error) to predict infection. Classical linear regression assumes no error in covariates; they are known exactly. This is rarely the case in ecology, and ignoring error in covariates can bias regression coefficient...

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(Another) introduction to R

May 27, 2013
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(Another) introduction to R

It’s Memorial Day and my dissertation defense is tomorrow. This week I’m phoning in my blog. I had the opportunity to teach a short course last week that was part of a larger workshop focused on ecosystem restoration. A fellow grad student and I taught a session on Excel and R for basic data analysis.

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useR! 2013 conference update

May 27, 2013
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Been trying to reach the website for the useR! 2013, the R user conference that will be held July 10-12 2013 at University of Castilla-La Mancha in Spain? There have been some server problems recently, but you can now get access at the official URL, www.r-project.org/useR-2013/. If you're going, be sure to check out the newly-announced Data Analysis Contest,...

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Log Transformations for Skewed and Wide Distributions

May 27, 2013
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Log Transformations for Skewed and Wide Distributions

This is a guest article by Nina Zumel and John Mount, authors of the new book Practical Data Science with R. For readers of this blog, there is a 50% discount off the “Practical Data Science with R” book, simply by using the code pdswrblo when reaching checkout (until …Read more »

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Permutation optimization with gaoptim package

May 27, 2013
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My recent update of gaoptim package brings up a new function, GAPerm, which can be used to perform combinatorial optimization using the Genetic Algorithm approach. The example below solves a TSP instance with 10 points around a circumference, the...

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Combinatorial optimization with gaoptim package

May 27, 2013
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My recent update of gaoptim package brings up a new function, GAPerm, which can be used to perform combinatorial optimization using the Genetic Algorithm approach. The example below solves a TSP instance with 10 points around a circumference, the...

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R / Finance 2013 Recap — and Presentation Slides

The fifth internation R/Finance conference was held last weekend. As one of the founding co-organizers, I may well be accussed of a little bias, but we think we once again pulled off a very nice and successful weekend-long event. Participants had ki...

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