lib/danica/function/gauss.rb in danica-2.4.2 vs lib/danica/function/gauss.rb in danica-2.4.3

@@ -1,36 +1,22 @@
 module Danica
-  class Function::Gauss < Function.build(:x, average: { latex: '\mu', gnu: :u }, variance_root: { latex: '\sigma', gnu: :v }) { multiplication(elements) }
+  class Function::Gauss < Function.build(:x, average: { latex: '\mu', gnu: :u }, variance_root: { latex: '\sigma', gnu: :v }) { num(1) / denominator * exponential(exp) }
 
     private
 
-    def elements
-      [
-        division(1, denominator),
-        exponential(exp)
-      ]
-    end
-
     def denominator
-      variance_root *
-      squared_root(
-        multiplication(2, PI),
-      )
+      variance_root * sqrt(num(2) * PI)
     end
 
     def exp
-      negative(
-        division(
-          power(group(
-            addition(x, negative(average))
-          ), 2),
-          multiplication(2, variance)
-        )
+      - (
+          ((x - average) ** 2) /
+          (num(2) * variance)
       )
     end
 
     def variance
-      @variance ||= power(variance_root, 2)
+      @variance ||= variance_root ** 2
     end
   end
 end