#! /bin/bash 

for fname in "$@" ; do

  if [[ -s out/${fname}.txt ]]; then

    echo "${fname}" 1>&2

    gnuplot <<EOF
    set term png 
    set output 'out/${fname}.png'
    # set xrange [0.640:0.710]
    set yrange [-0.090:+0.005]
    plot 'out/${fname}.txt' using 1:2 with lines
EOF

  fi

done