gbnlqreg - Non linear quantile regression

       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.

gbnlqreg 6.2                                        June 2021                                        GBNLQREG(1)

       Non  linear quantile 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.

       gbnlqreg - Non linear quantile regression

-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} >

       -q     set the quantile (default .5)

       -M     choose optimization method (default 0)

       0      Nelder-Mead Simplex o(N)

       1      Nelder-Mead Simplex o(N^2)

       -s     initial simplex scaling (default 1)

       -e     minimization tolerance (default 1e-5)

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

       -h     this help

       -v     verbosity level (default 0)

       0      just results

       1      comment headers

       2      summary statistics

       2      summary statistics

       3      covariance matrix

       4      minimization steps

       5      model definition

       -N     max minimization steps (default 500)

       Report bugs to <gbutils@googlegroups.com>

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

gbnlqreg [options] <functiondefinition>