Class: Keisan::Functions::MathFunction

Inherits:
ProcFunction show all
Defined in:
lib/keisan/functions/math_function.rb

Direct Known Subclasses

CMathFunction, Erf

Instance Attribute Summary

Attributes inherited from ProcFunction

#function_proc

Attributes inherited from Keisan::Function

#arity, #name

Instance Method Summary collapse

Methods inherited from ProcFunction

#call, #evaluate, #value

Methods inherited from Keisan::Function

#evaluate, #unbound_variables, #value

Constructor Details

#initialize(name, proc_function = nil) ⇒ MathFunction 



4
5
6
 
# File 'lib/keisan/functions/math_function.rb', line 4

def initialize(name, proc_function = nil)
  super(name, proc_function || Proc.new {|arg| Math.send(name, arg)})
end

Instance Method Details

#differentiate(ast_function, variable, context = nil) ⇒ Object

Raises:



13
14
15
16
17
18
19
20
21
 
# File 'lib/keisan/functions/math_function.rb', line 13

def differentiate(ast_function, variable, context = nil)
  raise Exceptions::InvalidFunctionError.new unless ast_function.children.count == 1
  context ||= Context.new

  argument_simplified = ast_function.children.first.simplify(context)
  argument_differentiated = argument_simplified.differentiate(variable, context)

  (argument_differentiated * self.class.derivative(argument_simplified)).simplify(context)
end

#simplify(ast_function, context = nil) ⇒ Object 



8
9
10
11
 
# File 'lib/keisan/functions/math_function.rb', line 8

def simplify(ast_function, context = nil)
  simplified = super
  self.class.apply_simplifications(simplified)
end