ROBFIT: A Code for the Analysis of Histogram Spectra with Nonlinear Regression and Robust Estimation
Abstract
This book contains the information needed to use the spectral fitting code ROBFIT. It explains the physical and mathematical foundations of the algorithms used in the code and describes to apply the code to real spectra. ROBFIT is a computer automated spectrum analysis package which tries to extract the maximum information from a histogram of intensity versus channel number. A non-linear minimization routine which uses a generalization of the Newton- Raphson technique has been developed and tested at the University of Florida's Department of Physics and Institute for Astrophysics and Planetary Exploration. This algorithm, simultaneous equation solver (SMSQ), is the central core of ROBFIT; SMSQ ensures the code finds the minimal fit, even with large numbers of non-linear constants in the fit. The intended user code is the person needing quick and accurate peak fitting with little user intervention. We have endeavored to make the code as user tolerant as possible and to the end we have included a user's guide in the book. Keywords: Least squares fitting, Fortran.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 04, 1990
- Accession Number
- ADA221527
Entities
People
- G. J. Bamford
- R. L. Coldwell
Organizations
- University of Florida