SAMMON_DATA
Sample M-Dimensional Datasets for Cluster Analysis

SAMMON_DATA is a MATLAB program which generates 6 files of test data for multivariate data clustering.

Usage:

sammon_data

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Related Data and Programs:

ASA113, a MATLAB library which implements the Banfield and Bassill clustering algorithm using transfers and swaps.

ASA136, a MATLAB library which implements the Hartigan and Wong clustering algorithm.

CLUSTER_ENERGY, a FORTRAN90 program which groups data into a given number of clusters to minimize the energy.

KMEANS, a MATLAB library which contains several different algorithms for the K-Means problem.

MARTINEZ, a dataset directory which contains datasets for computational statistics;

MDS, a dataset directory which contains datasets for M-dimensional scaling;

PCL, a dataset directory which contains datasets from a gene expression experiment on Arabidopsis, which are candidates for data cluster analysis;

SPAETH, a dataset directory which contains datasets for cluster analysis;

SPAETH, a FORTRAN90 library which can cluster data according to various principles.

SPAETH2, a dataset directory which contains datasets for cluster analysis;

SPAETH2, a FORTRAN90 library which can cluster data according to various principles.

Reference:

1. Ronald Fisher,
   The use of multiple measurements in taxonomic problems,
   Annual Eugenics,
   Volume 7, part II, 1936, pages 179-188.
2. John Sammon,
   A nonlinear mapping for data structure analysis,
   IEEE Transactions on Computers,
   Volume C-18, Number 5, May 1969, pages 401-409.

Source Code:

• sammon_data.m, the source code.

Examples and Tests:

• sammon_data_test_output.txt, the output file.
• sammon_circle.txt, points on a circle.
• sammon_helix.txt, points on a helix.
• sammon_iris.txt, Fisher's iris data.
• sammon_linear.txt, points on a line.
• sammon_nonlinear.txt, points on a nonlinear curve.
• sammon_simplex.txt, points clustered around the vertices of a simplex.

List of Routines:

• SAMMON_DATA generates data for SAMMON tests.
• DATA_CIRCLE writes the circle test data.
• DATA_HELIX writes the helix test data.
• DATA_IRIS writes the Iris test data.
• DATA_LINEAR writes the straight line test data.
• DATA_NONLINEAR writes the nonlinear test data.
• DATA_SIMPLEX writes the nonlinear test data.
• R8MAT_WRITE writes an R8MAT file.
• SIMPLEX_COORDINATES2 computes the Cartesian coordinates of simplex vertices.
• TIMESTAMP prints the current YMDHMS date as a timestamp.

You can go up one level to the MATLAB source codes.