The above map (and this one) was produced using R and ggplot2 and serve to demonstrate just how sophisticated R visualisations can be. We are used to seeing similar maps produced with conventional GIS platforms or software such as Processing but I hadn’t yet seen one from the R community (feel free to suggest...
For a much better looking version of this post (where code is actually readable!), see this Github repository, which also contains some of the example datasets I use and a literate programming version of this tutorial. Introduction This is a bare-bones introduction to ggplot2, a visualization package in R. It assumes no knowledge of...
I was looking for data I could use with the geom_text() object in ggplot2 and came across this data from the World Health Organization about the suicide rates by country which I found very handy for my example. I used the scale_colour_gradient2() with...
My time as a grad student will soon draw to a close. With this comes the terrifying realisation that I'm going to start applying for jobs and, hopefully, interviewing soon, forever leaving my comfortable security blanket of academia. With that horrible thought in mind, I've been doing some poking around to see what various...
I saw the release of a new version of twitteR package a few weeks back and thought I should be testing the code I wrote some time ago but also do something interesting at the same time. Thus I came up with the idea of checking out how Presidents are do...
Introduction First day back to work after New Year celebrations and my brain doesn’t really want to think too much. So I went out for lunch and had a nice walk in the park. Still had 15 minutes to kill before my lunch break was over and so decided to kill some time with a quick...
Here is a little example of what I do. While learning R isn't easy, it can be very powerful and efficient once you get your feet wet. I intend for this example to whet your appetite. This should take you less than 20 minutes. By the end, you will...
A famous finance professor once told us that good diversification meant holding everything in the world. Fine, but in what proportion? Suppose you could invest in every country in the world. How much would you invest in each? In a market-capitalization weighted index, you'd invest in each country in proportion to the market value of...
So the Weecology folks have published a large dataset on mammal communities in a data paper in Ecology. I know nothing about mammal communities, but that doesn't mean one can't play with the data...Their dataset consists of five csv files: &...
This blog has lasted a whole year already. Thanks for reading and commenting. There are a couple of announcements:Less blogging: I hope to put in many more years blogging here, but in full disclosure, I am blogging for Journal of Ecology no...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).