gbfun - Apply functions to table of data

       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.

gbfun 6.0.beta2                                   October 2018                                          GBFUN(1)

       Compute  specified  functions on data read from standard input. The default is to perform the computation
       column-wise, on each row of data separately.  Variable 'xi' stands for the i-th column while 'x0'  stands
       for  the row number, e.g. a function f(x1,x2) operates on the first and secod column.  With the option -t
       the function is computed, in turn, on every column. In this case f(x1,x2) stands for a  function  of  the
       column  itself  and  of  the  following  column  (the index being a lead operator). In these cases 'x' is
       equivalent to 'x1'. With -r or -R the function is recursevely computed "columwise" on each row.  In  this
       case  the  variable 'x' identifies the result of the previous evaluation. A lag operator can be specified
       with the letter l, like in 'x1l2', which means the first column two steps before.  More functions can  be
       specified and will be considered in turn.

       gbfun 'x0+log(x2)' < file
              print the log of the second column of 'file' adding the progressive number of the row

       gbfun -T 'x0+log(x2)' < file
              print the log of the second row of 'file' adding the progressive number of the column

       gbfun -r 0 'x+sqrt(x1)' < file
              print the sum of the square root of the elements of the first column of 'file'

       gbfun - Apply functions to table of data

-T     compute the function row-wise, on each column separately.

       -t     compute on each column

       -r     set initial value and compute recursively

       -R     set initial value, compute recursively and print intermediary results

       -v     verbose mode

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

       -o     set the output format (default '%12.6e')

       -s     set the output separation string (default ' ')

       -h     this help

       Report bugs to <gbutils@googlegroups.com>

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

gbfun [options] <functiondefinition> ...