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NEA.m

16 Jun 2004 (Updated 29 Nov 2004)

No BSD License

Performs network environ analysis on network models of energy-matter flow and storage.

File Information

Description

Network Environ Analysis (NEA) is a formal, quantitative methodology to describe an object's within system environment (Patten 1978). It provides a perspective of the environment, based on general systems theory and input-output analysis. This approach is one type of a more general conceptual approach called ecological network analysis. Application of Network Environ Analysis on ecosystem models has revealed several important and unexpected results, which have been identified and summarized in the literature as network environ properties. To conduct the analysis one needs system data including the intercompartmental flows, compartmental storages, and boundary input and output flows. The software presented herein uses these data to perform the main network environ analyses and environ properties including unit environs, indirect effects ratio, network homogenization, network synergism, network mutualism, mode partitioning, and environ control.

This function, created by Brian Fath and Stuart Borrett, returns a vector of network statistics and environ properties to the workspace and saves resultant matrices in a file called 'NEA_output.mat'. These results can be loaded into the workspace using the load command. See comments in the program for more detials.

MATLAB release

MATLAB 6.5 (R13)

Tags for This File
Everyone's Tags	earth sciences, ecology, ecosystem, network analysis
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Comments and Ratings (2)
29 Apr 2008	jason tharmaraj
18 Jul 2008	Jason Tharmaraj	please send me the sample data file

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Updates
29 Nov 2004	This updated file matches the program published in: Fath,B.D, Borrett, S.R. (In Press) A MATLAB Function for Network Environ Analysis. Environmental Modelling & Software.

Tag Activity for this File
Tag	Applied By	Date/Time
network analysis	Stuart Borrett	22 Oct 2008 07:24:06
ecosystem	Stuart Borrett	22 Oct 2008 07:24:06
ecology	Stuart Borrett	22 Oct 2008 07:24:06
earth sciences	Stuart Borrett	22 Oct 2008 07:24:06

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