#
# esize_vs_z
#
# get
#   r.m.s. electron beam size vs z 
#

if test $# -ne 2 
then
  echo usage: `basename $0` 'direction[x|y]' ELFIN_outputfile 
  exit
fi 

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