Record Display for the EPA National Library Catalog


Main Title Application of Cluster Analysis to Aerometric Data. Volume I. Part 1: Clustering, Validation, and Classification of Data. Part 2: Investigation and Report of Cluster Analysis.
Author Crutcher, Harold L. ; Nelson, Carl ; Fairbairn, B. ; Symons, M. ;
CORP Author Environmental Monitoring Systems Lab., Research Triangle Park, NC.
Year Published 1980
Report Number EPA-600/4-80-048A;
Stock Number PB82-226432
Additional Subjects Air pollution ; Data processing ; Multivariate analysis ; Regression analysis ; Correlations ; Mathematical models ; California ; Environmental monitoring ; Cluster analysis ; NORMIX computer program ; Los Angeles Catalyst Study ; Univac 1110 Computers ; Outliers
Library Call Number Additional Info Location Last
NTIS  PB82-226432 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 145p
The calibration and enhancement of Wolfe's NORMIX (normal mixtures) computer program in the National Computing Center of the U.S. Environmental Protection Agency at the Research Triangle Park, NC is documented. The program is available for data clustering, validation, and classification. In Part 1, an historical perspective of the NORMIX algorithm is presented with details of calibration, using the Fisher-Anderson Iris data set. New program options are then introduced with illustrative outputs including clustering features such as variate profiles and bivariate representations. In Part 2, Statistical Analysis Systems (SAS) and Multivariate Iterative K-Means Cluster Analysis (MIKCA) clustering algorithms are applied to Los Angeles Catalyst Study (LACS) data to investigate their performance as a multivariate tool for modeling air pollution data. This volume, Volume I, of a 3-volume series comprises the report for Parts 1 and 2. Parts 3 and 4 are reported in Volumes II and III, respectively.