Articles by Scott Chamberlain

Two-sex demographic models in R

October 26, 2011 | Scott Chamberlain

Tom Miller (a prof here at Rice) and Brian Inouye have a paper out in Ecology (paper, appendices) that confronts two-sex models of dispersal with empirical data.They conducted the first confrontation of two-sex demographic models with empirical data on...
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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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CRdata vs. Cloudnumbers

July 14, 2011 | Scott Chamberlain

Cloudnumbers and CRdata are two new cloud computing services.I tested the two services with a very simple script. The script simply creates a dataframe of 10000 numbers via rnorm, and assigns them to a factor of one of two levels (a or b). I then take ...
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iEvoBio 2011 Synopsis

June 22, 2011 | Scott Chamberlain

We just wrapped up the 2011 iEvoBio meeting. It was awesome! If you didn't go this year or last year, definitely think about going next year.Here is a list of the cool projects that were discussed at the meeting (apologies if I left some out):Vistrails...
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PLoS journals API from R: "rplos"

June 21, 2011 | Scott Chamberlain

The Public Libraries of Science (PLOS) has an API so that developers can create cool tools to access their data (including full text papers!!).Carl Boettiger at UC Davis and I are working on R functions that use the PLoS API. See our code on Githu...
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How to fit power laws

June 7, 2011 | Scott Chamberlain

A new paper out in Ecology by Xiao and colleagues (in press, here) compares the use of log-transformation to non-linear regression for analyzing power-laws.They suggest that the error distribution should determine which method performs better. When you...
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plyr’s idata.frame VS. data.frame

May 13, 2011 | Scott Chamberlain

I had seen the function idata.frame in plyr before, but not really tested it. Here are a few comparisons of operations on normal data frames and immutable data frames. Immutable data frames don't work with the doBy package, but do work with aggregate i...
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