Rick Wicklin contacted me with a helpful suggestion for improving the data presentation method outlined in my previous post on using ggplot2 to visualize some data. In the previous post I had plotted up a highly correlated set of points, showing the correspondence between maximum daily body temperatures of model snails sitting with the foot
Blog Archives
A simple ggplot2 scatterplot
Here’s a bit of code used to produce one of the figures in my recent paper dealing with modeling rocky intertidal snail body temperatures. This was my first foray into ggplot2, and it only involved a few hours of head-scratching. The plot is a co...
Digitizing data from old plots using ‘digitize’
The June 2011 issue of The R Journal contains an article on the R package digitize (link to pdf) by Timothée Poisot. This might prove to be a handy tool if you occasionally find yourself needing to retrieve data points from figures in old articles for...
One minor detail for getting 64-bit R-2.13 running with Eclipse/StatET
Upgrading from R-2.12 to R-2.13 was fairly painless, except for one minor hiccup in trying to get the 64-bit version running on my installation of Eclipse + StatET under Windows 7. The setup instructions are almost entirely the same as I have outlined ...
Extracting sea surface temperatures from NOAA’s OISSTv2
NOAA’s Physical Sciences Division produces a global map of weekly averaged sea surface temperatures, derived from satellite sources. The data can be found at http://www.esrl.noaa.gov/psd/data/gridded/data.noaa.oisst.v2.html. I’ve put togeth...
RStudio – another integrated development environment for R
If you’re in the market for a very easy-to-setup integrated development environment for R, wander over to RStudio.org. They’ve just released a beta version of their freely-available front end for R that runs under Windows, Linux and Mac OS ...
Converting MATLAB and R date and time values
For some unknown reason, MATLAB codes its date/time values as the number of elapsed days starting from January 1 in the year 0000. R uses the equally arbitrary, but much more widespread POSIX/Unix epoch as a reference for time keeping, so that R’...
Accessing NOAA tide data with R
Here's some R code that can be used to download archived tide height data from NOAA's CO-OPS OPeNDAP server. The code makes use of RCurl to send a URL query to the server, and then splits apart the resulting data into a data frame.
Book Review: Mixed Effects Models and Extensions in Ecology with R
A brief review of Zuur et al.'s book "Mixed Effects Models and Extensions in Ecology with R".
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
