igraph

igraph and SNA: an amateur’s dabbling

June 29, 2012 | tylerrinker

I’ve been playing with the igraph package a bit lately (see previous post HERE) and wanted to approach a problem I once visited in the past. The basic gist of the problem is this: Students in a class are asked … Continue reading → [Read more...]

igraph and structured text exploration

June 29, 2012 | tylerrinker

I am in the slow process of developing a package to bridge structured text formats (i.e. classroom transcripts)  with the tons of great R packages that visualize and analyze quantitative data (If you care to play with a rough build … Continue reading → [Read more...]

What does this package look like?

May 1, 2012 | tuxettechix

In this post, I give a very simple trick to understand the way a package is organized, which functions are included in and how these functions depend from each others. The idea has been brought by one of my student, Soraya, who is currently working in a very hostile environment, ... [Read more...]

New food web dataset

October 14, 2011 | Scott Chamberlain

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...
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basic ggplot2 network graphs – ver2

March 23, 2011 | Scott Chamberlain

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...
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basic ggplot2 network graphs

March 17, 2011 | Scott Chamberlain

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...
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Installing ‘intergraph’ package

September 17, 2010 | Michal

After some e-mails I decided to put together a bit more detailed instruction how to install the ‘intergraph’ package together with the namespaced version of the ‘network’ package. See here. There seemed to be some problems with downloading the namespaced ‘network’ from my webstite (thanks Neil!). File permissions were set ... [Read more...]

Namespaces and name conflicts

August 31, 2010 | Michal

R packages ‘igraph’ and ‘network’ are good examples of two R packages providing similar but complementary functionalities for which there are a lot of name conflicts. As for now the ‘igraph’ package has a namespace while the ‘network’ package (version 1.4-1) does not. This became an issue when I was ... [Read more...]

From igraph to network and back again

August 25, 2010 | Michal

In an effort to achieve this (last paragraph), I created a couple of functions to coerce networks as ‘igraph’ objects to networks as ‘network’ objects and vice versa. I wrapped them into a package called ‘intergraph’ which I just uploaded to my personal miniCRAN. Please mind, this is still an ... [Read more...]

Experiments with igraph

April 21, 2010 | nsaunders

Networks – social and biological – are all the rage, just now. Indeed, a recent entry at Duncan’s QOTD described the “hairball” network representation as the dominant cultural icon in molecular biology. I’ve not had occasion to explore networks “professionally”, but have always been fascinated by both networks and the ...
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