MultiVariate Statistical Package - MVSP

MVSP is an inexpensive and easy to use program that performs a number of multivariate numerical analyses useful in many scientific fields. It calculates three basic types of eigenanalysis ordinations: principal components, principal coordinates, and correspondence/detrended correspondence analyses.

It provides a means of analysing your data in fields ranging from ecology and geology to sociology and market research.
MVSP performs several types of eigenanalysis ordinations: principal components (PCA), principal coordinates (PCO), and correspondence/ detrended correspondence analyses (CA/DCA). It also does canonical correspondence analysis (CCA), a technique highly popular in ecological studies.
MVSP uses the KCS desktop metaphor. You can spread out your data, the statistical results and graphs in front of you while you study them, just like paper on your desktop. It also has a notepad where you can jot down ideas and observations.
It can also perform cluster analysis, using 20 different distance or similarity measures and seven clustering strategies. A dual clustering option lets you produce dendrograms of both variables and cases in one step, along with a copy of the original data matrix, sorted in the same order as the dendrograms. Constrained clustering may also be performed, so that the original input data order is maintained. Diversity indices may be calculated on ecological data; these include Simpson’s, Shannon’s, and Brillouin’s indices.
Once your data have been analyzed you can plot the results directly. Select the ordination axes you want to see and scattergrams will be drawn. Joint plots of both variables and cases can be drawn for CA results. Euclidean biplots of PCA results (with variables as vectors) can be produced, as can biplots of the environmental variables in CCA. The number of cases and variables that can be analysed is limited only by the amount of memory available, up to a maximum of 2 billion cases and variables.
Version 3 adds canonical correspondence analysis, a technique highly popular in ecological studies. It can also perform cluster analysis, with 23 different distance and similarity measures and seven clustering strategies. MVSP is in use at hundreds of sites in 86 countries and its results have been published in numerous scientific journals, including Science and Nature.

Features of MVSP Version 3

• Easy to use, with modern Windows interface (configurable toolbar, context menus, simple menu structure).
• Numerous user-defined options that are automatically saved for future use.
• Saveable desktop; you can save all the results, graphs and notes of the current analysis session to disk, then restore them later to resume where you left off.
• Unlimited number of variables and cases (restricted only by available Windows memory, including both RAM and hard disk swap file).
• Data matrix manipulation:

1. Built in spreadsheet-like data editor; includes full multilevel undo capabilities, row and column deletion and insertion.
2. Transposition of matrix.
3. Transformation of data, using logarithms to base 10, e, and 2, square root, Aitchison’s logratio for percentage data, and standardization. Individual variables may be selected for transformation.
4. Conversion to range through format for stratigraphic studies.
5. Can assign individual cases to pre-designated groups; these are then shown on results and graphs.
6. Merging of several data files into one.
7. Data import and export; Lotus 1-2-3 and Symphony, Excel, Quattro, xBase, Paradox, SIMSTAT, plain text and Cornell Ecology Programs.
8. Import process eased by the use of the Import Preview dialog; lets you preview the imported data and change options to ensure successful results.

 MultiVariate Statistical Package - MVSP