histogram puts

gistfile1

def histogram(data, bins = 10, length = 100)
  min, max = data.minmax
  mod = max - min
  histog = data.group_by { |v| ((v - min).to_f / mod * bins).to_i }.map { |bin, values| [bin, values.count] }.to_h
  max_value = histog.map { |_, value| value }.max
  histog_array = [0] * bins
  histog = histog.each { |bin, value| histog_array[bin] = (value.to_f / max_value * length).to_i }
  puts histog_array.to_s
  puts min.to_s + " " * length + max_value.to_s
  histog_array.each { |value| puts "*" * value.to_i }
  puts max
end