Accession Number : AD0717714

Title :   FITIT, A Computer Program to Least Squares Fit Non-Linear Theories.

Descriptive Note : Technical rept.,

Corporate Author : AIR FORCE ACADEMY COLO

Personal Author(s) : Head,James H.

Report Date : DEC 1970

Pagination or Media Count : 50

Abstract : This report describes the FORTRAN IV computer program, FITIT, which fits arbitrary non-linear theoretical functions by the method of least squares. Given a set of measurements and given a theoretical expression which is a function of a few unknown parameters, the program simultaneously adjusts the parameters to determine their values which allow the function to best fit the data. The report describes in detail the mathematical methods of the fitting procedure and discusses the program's operation. The report concludes with two example problems which will serve as a guide for the individual user in adapting FITIT to his own needs. (Author)

Descriptors :   (*CURVE FITTING, *COMPUTER PROGRAMS), GAMMA RAY SPECTRA, LEAST SQUARES METHOD, CORRELATION TECHNIQUES, NONLINEAR SYSTEMS, ITERATIONS

Subject Categories : Statistics and Probability
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE