.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.47.3.
.TH GBNLREG "1" "March 2018" "gbnlreg 5.7.1" "User Commands"
.SH NAME
gbnlreg \- Non linear regression
.SH SYNOPSIS
.B gbnlreg
[\fI\,options\/\fR] \fI\,<function definition>\/\fR
.SH DESCRIPTION
Non linear least square regression. Read data in columns (X_1 .. X_N).
The model is specified by a function f(x1,x2...) using variables names
x1,x2,..,xN for the first, second .. N\-th column of data. f(x1,x2,...)
are assumed i.i.d.
.SH OPTIONS
.TP
\fB\-O\fR
type of output (default 0)
.TP
0
parameters
.TP
1
parameters and errors
.TP
2
<variables> and residuals
.TP
3
parameters and variance matrix
.TP
4
parameters, errors and s\-scores
.TP
\fB\-V\fR
variance matrix estimation (default 0)
.TP
0
<gradF gradF^t>
.TP
1
< J^{\-1} >
.TP
2
< H^{\-1} >
.TP
3
< H^{\-1} J H^{\-1} >
.TP
\fB\-v\fR
verbosity level (default 0)
.TP
0
just results
.TP
1
comment headers
.TP
2
summary statistics
.TP
3
covariance matrix
.TP
4
minimization steps
.TP
5
model definition
.TP
\fB\-M\fR
estimation method (default 0)
.TP
0
ordinary least square  (OLS)
.TP
1
minimum absolute deviation (MAD)
.TP
2
asymmetric MAD
.TP
\fB\-e\fR
minimization tolerance (default 1e\-5)
.TP
\fB\-i\fR
minimization max iterations (default 500)
.TP
\fB\-E\fR
restart accuracy (default 1e\-5, ignored with option \fB\-M\fR 0)
.TP
\fB\-I\fR
restart max iterations (default 2000, ignored with option \fB\-M\fR 0)
.TP
\fB\-F\fR
input fields separators (default " \et")
.TP
\fB\-h\fR
this help
.SH AUTHOR
Written by Giulio Bottazzi
.SH "REPORTING BUGS"
Report bugs to <gbutils@googlegroups.com>
.PP
.br
Package home page <http://cafim.sssup.it/~giulio/software/gbutils/index.html>
.SH COPYRIGHT
Copyright \(co 2001\-2018 Giulio Bottazzi
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
(version 2) as published by the Free Software Foundation;
.PP
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.