#
# z vs electron size 
#


if test $# -ne 2 
then
  echo usage: `basename $0` axis filename
  exit
fi 
egrep 'distance|spread' $2 |\
awk  -F"=" '
  /distance/  { z = $2 ; ok = 1 } 
  /position '$1'/    { if( ok ==1 ){ printf "%.5e %.5e\n", z, $2 } ; ok = 0 }'