
Accession Number : ADB040229
Title : A Manual for General Least Squares Model Fitting.
Descriptive Note : Technical rept.,
Corporate Author : ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
Personal Author(s) : Celmins, Aivars
Report Date : JUN 1979
Pagination or Media Count : 113
Abstract : This manual outlines the theory of general least squares model fitting and describes the operation of four computer programs for model fitting by a least squares method. The distinct features of the programs are that they are applicable to problems where the constraints (models) are nonlinear equalities, that they take into consideration the accuracy of data and correlations between them, and that they compute variance estimates using complete formulas. The four programs are: COLSAC  for nonlinear curve fitting; COLSMU  for problems with constraints in form of simultaneous nonlinear equations; COLSAV  for computation of vector averages from correlated data; TALSAC  for problems involving nonlinear transformations of variables.
Descriptors : *LEAST SQUARES METHOD, *COMPUTER PROGRAMS, MATHEMATICAL MODELS, CURVE FITTING, PARAMETERS, ESTIMATES, ACCURACY, ANALYSIS OF VARIANCE, NONLINEAR SYSTEMS, CORRELATION TECHNIQUES.
Subject Categories : Statistics and Probability
Computer Programming and Software
Distribution Statement : APPROVED FOR PUBLIC RELEASE