class MoreMath::Histogram

histogram bar.
edge. +width+ is usually an integer number representing the width of a
the +width+-normalized frequence count value, and +r+ the right bin
Returns an array of tuples (l, c, r) where +l+ is the left bin edge, +c+

def prepare_display(width)
  r = @result.reverse
  factor = width.to_f / (r.transpose[1].max)
  r.map { |l, c, r| [ l, (c * factor).round, r ] }
end