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 |
Additional Subjects |
Environmental surveys ;
Air pollution ;
Mathematical models ;
Comparison ;
Sources ;
Reprints ;
R mode analysis ;
Q mode analysis
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB85-170124 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
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 |
Cataloging Source |
NTIS/MT |
Control Number |
513021864 |
Origin |
NTIS |
Type |
CAT |