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://github.com/hfst/hfst/wiki/HfstReweight>
       General help using HFST software: <https://github.com/hfst/hfst/wiki>

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.

HFST                                               August 2018                                  HFST-REWEIGHT(1)