So, there is a new food web dataset out that was put in Ecological Archives here, and I thought I would play with it. The food web is from Otago Harbour, an intertidal mudflat ecosystem in New Zealand. The web contains 180 nodes, with 1,924 links. Fu...
I just released the first official version of the ‘intergraph’ R package. With the functions provided in the current version (1.1-0) you can convert network data objects between classes ‘igraph’ and ‘network’. The package supports directed and undirected networks, and handles the node, tie, and network (graph) attributes. Mutliplex networks (i.e., with possibly multiple...
Elijah asked the following via SOCNET mailing list: I was wondering if anyone knew of a script or tool which would give me the network distance of nodes to a particular class of nodes. I think of this as an Erdos number, except instead of getting the distance to one node, I want the...
I posted last week a simple function to plot networks using ggplot2 package. Here is version 2. I still need to work on figuring out efficient vertex placement.Changes in version 2:-You have one of three options: use an igraph object, a matrix, or a da...
I have been looking around on the web and have not found anything yet related to using ggplot2 for making graphs/networks. I put together a few functions to make very simple graphs. The bipartite function especially is not ideal, as of course we only w...
Earlier, I posted about generating networks from abundance distributions that you specify. If this post was interesting, check out Jeff Kilpatrick's website, where he provides code he produced in R and Octave to compare real bipartite networks to ones ...
Another grad student and I tried recently to make a contribution to our understanding of the relationship between ecological network structure (e.g., nestedness) and community structure (e.g., evenness)......Alas, I had no luck making new insights. How...
As part of my on-going research simulating network structure using graph motifs I have been collecting novel data sets to test and benchmark the method. Since I am a political scientist studying conflict, it was suggested to me to collect a co-authorship network within this sub-discipline. Such a network is useful for...
A short update on network+intergraph R packages story: Couple of days ago Carter Butts released a new version of the ‘network’ package (ver. 1.5-1). It has a namespace now. Consequently, the ‘intergraph’ package should work out-...
The next Sunbelt Social Networks Conference (XXXI) will take place in February 2011 in St Pete Beach, Florida, USA. The preliminary program is available here. There is still time to submit abstracts (deadline is on October 29, 2010). At the conference I will be teaching the workshop “Introduction to Social Network Analysis with R”....
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).