How can I calculate the mode of a floating point array in Ruby?

Question

I have an array of floating point data, I would like to pick out the most probable value. It is called "mode" in descriptive statistics. How can I calculate it in Ruby, or with the help of a gem.

Answer 1

[0.0, 0.1, 0.2, 0.1, 0.3, 0.3, 0.1]
.group_by{|e| e}.max_by{|k, v| v.length}.first
# => 0.1