Ryan Peek showed us how to use an .Rprofile file to customize your R setup. Here are his instructions and script: For Windows To change profile for R, go here: C:\Program Files\R\R-2.15.1\etc (or whatever version you are using) Edit the “Rprofile.site” file Restart R For ... [Read more...]

At DRUG today, Chris Hamm (email (cahamm at ucdavis dot edu)) showed us an easier way to combine multiple figures into one plot using plot.new, rather than par(mfrow=...) Here’s his script: A Report Generated by knitr # plot.new() [email protected] #I discovered this plotting method when ... [Read more...]

In D-RUG today, Stella Copeland gave a quick introduction to mixed models in R. Here’s the script that she presented: Get the data file for this script here Stella also recommends this paper by Ben Bolker as a quick introduction to the topic. [Read more...]

I gave a short talk today to the [Davis R Users’ Group] about ggplot. This what I presented. Additional resources at the bottom of this post ggplot is an R package for data exploration and producing plots. It produces fantastic-looking graphics and allows one to slice and dice one’s ... [Read more...]

I’m excited to share that we’ve started a new R users’ group at UC Davis! Right now our main purpose is to run weekly 2-hour work/hack sessions where R users can get together to work through problems together. More info here [Read more...]

I wrote a few functions to grab data and from the Global Pollen Database:

<span>source</span>(<span>"~/code/_Pollen/pollendatafuntions.R"</span>)
## Loading required package: stratigraph
## Loading required package: grid
## Loading required package: graphics
## Loading required package: stats
billys <- <span>getpctAP</span>(<span>"billys"</span>, <span>plot =</span> <span>TRUE</span>)
## Number of taxa:  105 
## Number of levels:  77

Arboreal Pollen over time at Billy’s Lake Clearly, there’s are trends at different time scales. The trouble with using S-Maps on this is that there are uneven sampling intervals. One option is to ... [Read more...]