Minimums

#!/usr/bin/ruby
require 'yaml'

def parse_file(path)
  body = File.read(path)
    .gsub(/^\s*\d+\s*=>\s*/, '').delete('{},').strip
  body.each_line.map {|e| { val: e.to_f, path: path } }
end

min_data = Dir['file*'].map {|path| parse_file(path) }
  .transpose
  .map {|e| e.min_by {|v| [v[:val], v[:path]] } }

# simple
open('simple.txt', 'w') {|f| min_data.each {|e| f.puts e } }

# with path
open('withpath.txt', 'w') do |f|
  min_data.each {|e| f.puts "#{e[:val]}, #{e[:path]}" }
end

# yaml
YAML.dump(min_data, File.open('result.yaml', 'w'))