Accession Number:

AD0731037

Title:

NORMIX 360 Computer Program.

Descriptive Note:

Research memorandum rept.,

Corporate Author:

NAVAL PERSONNEL AND TRAINING RESEARCH LAB SAN DIEGO CALIF

Personal Author(s):

Report Date:

1971-09-01

Pagination or Media Count:

123.0

Abstract:

The report gives the documentation, listing, and printouts of a sample run for the NORMIX 360 computer program. The program seeks maximum-likelihood estimates of the parameters of a mixture of multivariate normal distributions. The likelihood equations are solved iteratively by continually re-estimating the probability of membership of each sample point in each cluster until the likelihood reaches a relative maximum. The initial estimates are derived from a minimum-variance hierarchial grouping subroutine, which itself is iterative in seeking an appropriate distance function. The program prints out the means, standard deviations and inter-correlations of the variables within clusters, and the proportions of the population for each cluster. The probabilities of membership of each point in each cluster are also printed. Author

Subject Categories:

  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE