Multilevel Dendrogram Comparison (DenComPar) for WINDOWS

The Simplex method (SDRSimplex) Download Zip file

The Simplex method for abundances(SDR-abunSimplex) Download Zip file

Multilevel Dendrogram Comparison (DenComPar) Download Zip file

Five variants of IndVal (IndValCom) Download Zip file


I have been developing software for multivariate data analysis for more than two decades. The most significant result is the release of SYNTAX 2000 for WINDOWS 95, 98 and NT systems.

Freely available from September, 2015!!
Download Zip file for SYNTAX 2000
Download Zip file for SYNTAX 5.1 for DOS

Main features

System requirements: the package runs under WINDOWS 95, 98 and NT.

Modular structure: five independently functioning routines. The first release contains HierClus, Ordin and NonHier.

Module HierClus: Hierarchical clustering (h-SAHN and d-SAHN methods, information theory clustering based on entropy and mutual information, divisive monothetic clustering, ordinal clustering, neighbor joining, global optimization, minimum spanning trees). Use of 33 dissimilarity coefficients, 6 run-time standardization procedures. Dendrograms, minimum spanning trees, additive trees, unrooted trees. Utilities.

Module Ordin: Metric and nonmetric ordination including PCA, PCoA, CA, CCoa, RDA, NMDS, canonical correlation analysis and canonical variates (discriminant) analysis. Ordination scatterplots, biplots, triplots, rotating plots. Minimum spanning trees and classification polygons superimposed on ordinations. Scree plots and Shepard diagrams. Use of 33 dissimilarity coefficients, 6 run-time standardization procedures in PCoA and NMDS. Utilities.

Module NonHier: Non-hierarchical clustering methods including k-means, multiple partitioning, global optimization, quick clustering, fuzzy c-means clustering and ordinal methods. Ternary plots and scattergrams to illustrate fuzzy classifications graphically. Use of 33 dissimilarity coefficients, 6 run-time standardization procedures in global optimization, three rank coefficients for ordinal clustering. Utilities.

Module Eval: not yet available

Module MatRank: not yet available

More technical details:

Coefficients - Methods - Utilities

Major changes compared to ver. 5.1

  1. Switch from DOS to 32-byte WINDOWS systems.
  2. No program-dependent problem size limits.
  3. Input file header now includes title and matrix size information.
  4. New format for label files. Long labels allowed in ordination scattergrams.
  5. More flexible graphics options, called from the main menu or in context-dependent form as pop-up menus when a diagram is displayed.Improved graphics features.
  6. Zooming entire diagrams or portions thereof to examine small details.
  7. Export/import of EXCEL datafiles.
  8. New graphics formats: BMP, EMF and WMF.
  9. TIF and PCX no longer supported, except in rotating plots.
  10. Simple text editor/file viewer.
  11. Only interactive mode; batch unavailable.
  12. Analysis of point patterns not included.
  13. Data grid in main window, showing input matrix.
  14. New utilities to create bootstrapped, randomized or otherwise resampled data files.
  15. Analysis of a data matrix in two ways, without previously transposing.
  16. Minimum spanning and unrooted neighbor joining trees with branch lengths.
  17. Scree plots for eigenvalues.

Screen shots

Please click the appropriate item to see the examples.

Examples for the user interface

Main Window of HierClus showing data grid

Main Window of Ordin showing Method menu

Main Window of NonHier showing Coefficient menu

Simple Text Editor showing datafile

Graphics windows

Dendrogram from HierClus

Rooted additive tree from HierClus

Minimum spanning tree topology from HierClus

Minimum spanning tree with true branch lengths from HierClus

Dendrogram with popup menu from HierClus

Unrooted additive tree from HierClus

Ordination scatter diagram from Ordin

Zoomed left part from above diagram

Scatter diagram with popup menu from Ordin

Biplot from Ordin

Shepard diagram from Ordin

Scree plot showing eigenvalues

CANOVAR biplot from Ordin

MST over an ordination

Convex polygons on an ordination

Ternary plot illustrating fuzzy clusters from NonHier.

SYN-TAX 2000

User's Manual

Spiralbound. 53 pages, with many illustrations.

The manual provides technical information on the use of SYN-TAX 2000, with special emphasis on input/output and graphics. There is a short section on theory as well.

For more, see the Contents

DOS and Mac

You may be still interested in (SYN-TAX 5.0 for DOS) and the upgrade notes for Version 5.1 or, alternatively, SYN-TAX Mac . You may also wish to see a brief list of references to SYN-TAX. I can also recommend some other programs for taxonomic and ecological data analysis.

Last updated on March 20, 2001