#
# gain_vs_z
#
#  get
#    fractional gain = Power(z)/InputPower -1 vs z 
#

if test $# -ne 1 
then
  echo usage: `basename $0` ELFIN_outputfile
  exit
fi

grep '=' $1 |\
egrep 'z = |fractional gain' |\
awk  -F"=" '
  BEGIN{ printf( "# %16s %16s\n", "z", "Gain") }
  /z = /              { z = $2 ; ok=1 } 
  /fractional gain/ { if(ok==1){ printf "%16.5e %16.5e\n", z, $2 }; ok=0 }'