Class: CooCoo::CostFunctions::MeanSquare

Inherits:
Base show all
Defined in:
lib/coo-coo/cost_functions.rb

Overview

Implements the mean square cost function. Its derivative is a simple difference between the target and actual output.

Class Method Summary collapse

Class Method Details

.call(target, x) ⇒ Object 



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# File 'lib/coo-coo/cost_functions.rb', line 47

def self.call(target, x)
  d = derivative(target, x)
  d * d * 0.5
end

.derivative(target, x, y = nil) ⇒ Object 



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# File 'lib/coo-coo/cost_functions.rb', line 52

def self.derivative(target, x, y = nil)
  x - target
end