A script for making 'focal length - number' graph

focal_length.sh

#!/usr/bin/env bash

FOCAL=focal.dat
WC=~/tmp/wc.rb

if [[ "$1" == "-t" && ! -z "$2" ]]; then
  exiftool -T -focallengthin35mmformat *.JPG | grep -v '-' | awk '{print NR, $0}' > $FOCAL
  gnuplot -p -e "set terminal png; set term png size 2000,500; set term png font 'ヒラギノ丸ゴ ProN W4, 16'; set output '$2'; set xlabel 'n枚目'; set ylabel '焦点距離'; plot '$FOCAL' using 1:2:(1) with boxes"
  rm $FOCAL
  open $2
elif [[ "$1" == "-c" && ! -z "$2" ]]; then
  exiftool -T -focallengthin35mmformat *.JPG | grep -v '-' | awk '{print $1}' | $WC > $FOCAL
  gnuplot -p -e "set terminal png; set output '$2'; set term png font 'ヒラギノ丸ゴ ProN W4, 12'; set xlabel '焦点距離'; set ylabel '枚数'; plot '$FOCAL' using 1:2:(1) with boxes"
  rm $FOCAL
  open $2
else
  echo "Usage: focal.sh (-c|-t) PLOTFILE"
fi

wc.rb

#!/usr/bin/env ruby
wc = {}
while w = gets
  w = w.to_i
  wc[w] = if wc[w] then wc[w] + 1 else 1 end
end
wc.sort_by do |kv|
  kv[0]
end.each do |kv|
  puts "#{kv[0]}\t#{kv[1]}"
end

wc.rb いらなくて、sort -n | uniq -c でいい