NAME

gbnlreg - Non linear regression

SYNOPSIS

gbnlreg [options] <function definition>

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.

OPTIONS

-O

type of output (default 0)

0

parameters

1

parameters and errors

2

<variables> and residuals

3

parameters and variance matrix

4

parameters, errors and s-scores

-V

variance matrix estimation (default 0)

0

<gradF gradF^t>

1

< J^{-1} >

2

< H^{-1} >

3

< H^{-1} J H^{-1} >

-v

verbosity level (default 0)

0

just results

1

comment headers

2

summary statistics

3

covariance matrix

4

minimization steps

5

model definition

-M

estimation method (default 0)

0

ordinary least square (OLS)

1

minimum absolute deviation (MAD)

2

asymmetric MAD

-e

minimization tolerance (default 1e-5)

-i

minimization max iterations (default 500)

-E

restart accuracy (default 1e-5, ignored with option -M 0)

-I

restart max iterations (default 2000, ignored with option -M 0)

-F

input fields separators (default " \t")

-h

this help

AUTHOR

Written by Giulio Bottazzi

REPORTING BUGS

Report bugs to <gbutils@googlegroups.com>

Package home page <http://cafim.sssup.it/~giulio/software/gbutils/index.html>

COPYRIGHT

Copyright © 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;

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.