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NTSYSpc, Numerical Taxonomy System, Version 2.0 for Windows95/98/NT

NTSYSpc can be used to discover pattern and structure in multivariate data. For example, one may wish to discover that a sample of data points suggests that the samples may have come from two or more distinct populations. Of equal interest is the discovery that the variation in some subsets of variables are highly inter-correlated.

The input can be descriptive information about collections of objects or directly measured similarities or dissimilarities between all pairs of objects. The kinds of descriptors and objects used depend upon the application—morphological characters, abundances of species, presence and absence of properties, etc. NTSYSpc can transform data, estimate dis/similarities among objects, and prepare summaries of the relationships using cluster and ordination analyses. Many of the results can be shown both numerically and graphically. The software is designed for both classroom and research.

Version 2 for Windows 95 is especially easy to use yet still has the speed and functionality of the previous DOS versions. There is still an interactive mode (with “fill-in-the-blanks” entry forms) and a batch mode with a simple command language (useful for analysis of simulations and multiple datasets). The program takes advantage of the Windows 95 environment and, for example, allows long file names and the processing of much larger datasets. Plot options windows allows you to customize the plots (specify titles, fonts, sizes, colors, scales, line widths, background colors, margins, and many other aspects of what is plotted). There is also a print preview mode. Data files are ASCII files that can be shared with other programs. Long input lines are now supported. A new spreadsheet-like data editor is now included that makes it easy to create and edit data files and also import data from Excel. Documentation includes a User Guide and an extensive help file with the technical details. Additional information about new features in version 2.0 and Sample screen shots are available.  There is also a Frequently Asked Questions page.

Some of the features include in NTSYSpc are listed below.
Similarity and dissimilarity: correlation, distance, 34 association coefficients, and 11 genetic distance coefficients.
Clustering: UPGMA and other hierarchical SAHN methods (allows for ties). Neighbor-joining method. Consensus trees.
Graph theoretic methods: minimum-length spanning trees.
Ordination: principal components & principal coordinates analysis, correspondence analysis, metric & non-metric multidimensional scaling analysis, singular-value decompositions, projections onto axes and Burnaby's method. Canonical variates analysis. Programs for common principal components analysis, partial least-squares, multiple correlation, and canonical correlations are also included.
Interactive graphics: phenograms, scatter plots , comparison of similarity matrices, and 3-D perspective plots.
Other: includes comparison of matrices by cophenetic correlation, Mantel test, data standardization, matrix transformations (simple functions, deletion, and now matrix transpose), Fourier transformations( includes 2D and 3D elliptic), and computation of 2D and 3D partial warp scores (used in morphometrics).

In addition, there is a  technical details www page.

Useful books when using NTSYSpc..

Licensed users can download a copy of the latest update to NTSYSpc when an update becomes available. Users should check our Frequently Asked Questions page for helpful hints on the use of NTSYSpc.

Y2K compliant! (dates are not used for any computations)

Requirements: Windows 95 or Windows NT. Requires about 3 MB of disk space.

Cost: $275 ($210 for educational and governmental institutions). Upgrades: $150 ($110 education and government). 10-user site licenses are $800 ($600 education and government). Plus shipping costs.

Ordering information:        
Orders may be placed by mail, e-mail, FAX, or phone.

Payment can be made by American Express, MasterCard, VISA, money order, or checks drawn on US banks. Institutional purchase orders are also accepted within the USA. Call, FAX, or e-mail to place your order today! Orders will be sent out promptly. Shipping costs.

Phone: 1-631-689-7838 (note area code changed from 516), Toll-free within USA: 800-842-5892
FAX: 1-631-689-0103, e-mail: sales@ExeterSoftware.com
47 Route 25A, Suite 2, Setauket, NY 11733-2870 USA
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