gbnlmult - Solve systems of non linear simultaneous equations

       Written by Giulio Bottazzi

       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.

gbnlmult 6.2                                        June 2021                                        GBNLMULT(1)

       Least  square  estimation  of  a system of j non linear equations. Read data in columns (X_1 .. X_N). The
       j-th equation is specified by a function f_j(x1,x2...)  using variables names x1,x2,..,xN for the  first,
       second...N-th  column  of  data.   The  f_j(x1,x2,...)'s  are  assumed i.i.d. according to a multivariate
       gaussian distribution.

       gbnlmult - Solve systems of non linear simultaneous equations

-O     type of output (default 0)

       0      parameters

       1      parameters and errors

       2      <variables> and residuals

       3      parameters and variance matrix

       -V     variance matrix estimation (default 0)

              0 <gradF gradF^t> 1  < J^{-1} > 2 < H^{-1} > 3  < H^{-1} J H^{-1} >

       -e     minimization tolerance (default 1e-5)

       -v     verbosity level (default 0)

       0      just results

       1      comment headers

       2      summary statistics

       3      covariance matrix

       4      minimization steps

       5      model definition

       -F     input fields separators (default " \t")

       -h     this help

       Report bugs to <gbutils@googlegroups.com>

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

gbnlmult [options] <functiondefinition>