EPA: MEANSIM6
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Title
| Mean Similarity Analysis |
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Author
| Van Sickle, J. |
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Abstract/Summary Statement
| MEANSIM6 contains software for Mean Similarity Analysis, a method of assessing the strength of a classification of many objects (sites) into a relatively small number of groups. Classification strength is measured by the extent to which sites within the same groups are more similar to each other, on average, than they are to sites in different groups. Users supply a matrix of pairwise similarities (or dissimilarities) for all possible pairs of sites to a program (RNDTST6) that calculates mean between and within-group similarities. The program also performs a permutation test of whether within-group similarities are larger than would be expected by chance. MEANSIM6 also contains SAS code for computing common similarity measures from tables of multiple attributes (for example species abundances) at each site. In addition, a program is supplied for finalizing a mean similarity analysis from the ouput of the MRPP programs contained in BLOSSOM and PC-ORD. |
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Table of Contents
| MEANSIM6.ZIP unZips into several files containing the programs, sample input/output files, and SAS code. Documentation is within the text file called "MEANSIM6.TXT" The enclosed programs run under Windows 95/98/NT. If you need a DOS or Windows 3.1 version (with or without Win32s), contact the author. |
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Citation
| Van Sickle, John, 1998, Documentation for MEANSIM, Version 6.0. U.S. Environmental Agency, last accessed March 15, 2012 at http://www.epa.gov/wed/pages/models/dendro/meansim6.htm |
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Method Source
| EPA |
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Source Organization Country
| USA |
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Publication Year
| 1998 |
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Special Notes
| Related articles: Van Sickle, J., 1997, Using Mean Similarity Dendrograms to Evaluate Classifications, Journal of Agricultural, Biological and Environmental Statistics 2, 370-388, available at http://www.epa.gov/wed/pages/models/dendro/msdendro.pdf AND Van Sickle, J. and Hughes, R.M., 2000, Classification strengths of ecoregions, catchments, and geographic clusters for aquatic vertebrates in Oregon. Journal of the North American Benthological Society 19:370-384, available at http://www.epa.gov/wed/pages/models/dendro/class_strength.pdf |
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Item Type
| Downloadable Software |
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Publication Source Type
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Government Agency (Federal, USA) |
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Purpose
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Data analysis |
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Design or Data Analysis Objectives
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Communities & populations |
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Complexity
| Medium |
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Media Emphasized
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Biological |
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Media Subcategory
| |
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Special Topics
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