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RECORD NUMBER: 2 OF 6

Main Title Comparison of R- and Q-Modes in Target Transformation Factor Analysis for Resolving Environmental Data.
Author Hwang, C. S.; Severin, K. G.; Hopke, P. K.;
CORP Author Illinois Univ. at Urbana-Champaign. Inst. for Environmental Studies.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1984
Report Number EPA/600/J-84/240;
Stock Number PB85-170124
Subjects Environmental surveys; Air pollution; Mathematical models; Comparison; Sources; Reprints; R mode analysis; Q mode analysis
Holdings
Library   Call Number Additional Info Location Date Modified
NTIS PB85-170124 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 10p
Abstract A target transformation factor analysis has been used for the quantitative resolution of environmental data. The initial studies have utilized the correlation between samples as the matrix defining the relationships within the data. The analysis of this matrix is a Q-mode analysis. For large data sets, this technique requires the diagonilization of a large matrix. An alternative approach is to examine the matrix of correlations between the measured parameters. The analysis of this matrix is called an R-mode analysis. It is found that for several typical data sets, equivalent results are obtained for the two modes and, in some cases, R-mode may yield better results. The faster diagonalization and smaller memory requirements of R-mode would seem to make it preferable.
Availability Notes Pub. in Atmospheric Environment, v18 n2 p345-352 1984.
NTIS Title Notes Journal article.
Title Annotations Reprint: Comparison of R- and Q-Modes in Target Transformation Factor Analysis for Resolving Environmental Data.
PUB Date Free Form c1984
Category Codes 13B; 68A
NTIS Prices Not available NTIS
Primary Description 600/09
Document Type NT
Control Number 513021864
Cataloging Source NTIS/MT
Origin NTIS
Type CAT