sample of Ruby-fann

sample_rubyfann.rb

require 'pp'
require 'ruby-fann'

def f(x,y)
  Math.exp(- ((x-1.0)/2.0)**2 - (y/1.0)**2 )
end

n = 100
inputs = []
n.times do |i|
  inputs << [ rand, rand]
end

desired_outputs = inputs.map {|x,y| [f(x,y)] }

train = RubyFann::TrainData.new(inputs: inputs, desired_outputs: desired_outputs)
fann = RubyFann::Standard.new(num_inputs: inputs.first.size, hidden_neurons: [2,8,4,3,4], num_outputs: desired_outputs.first.size)
fann.train_on_data(train, 10000, 10, 0.001)

10.times do |i|
  a = [rand, rand]
  pp fann.run(a), f(*a)
end