#!/usr/bin/ruby
require "ftools"


if ARGV.length<2 then
  puts "Argumets: [input file] [output file]"
  puts "   It is presumed that the data file has the columns: x y f(x,y)"
  puts "   Cycles through y values go in the inner loop."
  exit
end

# Read inn and interpret arguments
fname_in=ARGV[0]
fname_out=ARGV[1]



c1=""
fout=File.open(fname_out,"w")
File.open(fname_in) {|fin|
  while (line=fin.gets) != nil
    sl=line.split(' ')
    if c1!=sl[0] && c1!="" then
      fout.write("\r\n")
    end
    c1=sl[0]
    #puts c1
    fout.write("#{sl[2]} ")
  end
}
fout.close