NAME

       hfst-reweight - =Reweight transducer weights simply

SYNOPSIS

       hfst-reweight [OPTIONS...] [INFILE]

DESCRIPTION

       Reweight transducer weights simply

   Common options:
       -h, --help
              Print help message

       -V, --version
              Print version info

       -v, --verbose
              Print verbosely while processing

       -q, --quiet
              Only print fatal erros and requested output

       -s, --silent
              Alias of --quiet

   Input/Output options:
       -i, --input=INFILE
              Read input transducer from INFILE

       -o, --output=OUTFILE
              Write output transducer to OUTFILE

   Reweighting options:
       -a, --addition=AVAL
              add AVAL to matching weights

       -b, --multiplier=BVAL
              multiply matching weights by BVAL

       -F, --function=FNAME
              operate matching weights by FNAME

       -l, --lower-bound=LVAL
              match weights greater than LVAL

       -u, --upper-bound=UVAL
              match weights less than UVAL

       -I, --input-symbol=ISYM
              match arcs with input symbol ISYM

       -O, --output-symbol=OSYM
              match arcs with output symbol OSYM

       -S, --symbol=SYM
              match arcs with input or output symbol SYM or both

       -e, --end-states-only
              match end states only, no arcs

       -A, --arcs-only
              match arcs only, no end states

       -T, --tsv-file=TFILE
              read reweighting rules from TFILE

       If  OUTFILE  or  INFILE  is missing or -, standard streams will be used.  Format of result
       depends on format of INFILE If AVAL, BVAL or FNAME are omitted, they  default  to  neutral
       elements  of  addition, multiplication or identity function.  If LVAL or UVAL are omitted,
       they default to minimum and maximum values of the weight structure.  If ISYM, OSYM or  SYM
       are  omitted,  they default to a value that matches all arcs.  Only one ISYM, OSYM and SYM
       can be given.

       Float values are parsed with strtod(3) and integers strtoul(3).  The functions allowed for
       FNAME  are  <cmath> float functions with parameter count of 1 and a matching return value:
       abs, acos, asin, ... sqrt, tan, tanh

       The precedence of operands follows the formula BVAL * FNAME(w) +  AVAL.   The  formula  is
       applied  iff:  ((LVAL  <= w) && (w <= UVAL)), where w is weight of arc, and (ISYM == i) &&
       (OSYM == o) && ((SYM == i) || (SYM == o)) ^^ (end state && -e).

       TFILE should contain lines with tab-separated pairs of SYM and AVAL or BVAL.  AVAL  values
       must  be  preceded  by  a + character, BVAL should be given as plain digits. Comment lines
       starting with # and empty lines are ignored.

       Weights  are  by  default  modified  for  all  arcs  and   end   states,   unless   option
       --end-states-only or --arcs-only is used.

REPORTING BUGS

       Report   bugs   to   <hfst-bugs@helsinki.fi>   or   directly   to   our  bug  tracker  at:
       <https://github.com/hfst/hfst/issues>

       hfst-reweight home page: <https://kitwiki.csc.fi/twiki/bin/view/KitWiki//HfstReweight>
       General               help               using               HFST                software:
       <https://kitwiki.csc.fi/twiki/bin/view/KitWiki//HfstHome>

COPYRIGHT

       Copyright   ©   2017   University   of   Helsinki,   License  GPLv3:  GNU  GPL  version  3
       <http://gnu.org/licenses/gpl.html>
       This is free software: you are free to change and redistribute it.  There is NO  WARRANTY,
       to the extent permitted by law.