Class: Symbolic::FunctionWrapper

Inherits:
Object
  • Object
show all
Includes:
Symbolic
Defined in:
lib/symbolic/function.rb

Overview

class combines a function with an argument or arguments this class is what allows functions to be used in symbolic expressions

Constant Summary

Constants included from Symbolic

OPERATIONS

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Symbolic

#*, #**, #+, #+@, #-, #-@, #/, #coerce, #factorial, #inspect, #operations, #taylor, #to_s

Constructor Details

#initialize(arg, fctn) ⇒ FunctionWrapper

Returns a new instance of FunctionWrapper.



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# File 'lib/symbolic/function.rb', line 63

def initialize(arg, fctn)
  @argument, @function = arg, fctn
end

Instance Attribute Details

#argument ⇒ Object (readonly)

Returns the value of attribute argument.



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# File 'lib/symbolic/function.rb', line 61

def argument
  @argument
end

#function ⇒ Object (readonly)

Returns the value of attribute function.



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# File 'lib/symbolic/function.rb', line 61

def function
  @function
end

Instance Method Details

#==(object) ⇒ Object 



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# File 'lib/symbolic/function.rb', line 97

def ==(object)
  (object.function == @function and object.argument == @argument) rescue false
end

#detailed_operations ⇒ Object 



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# File 'lib/symbolic/function.rb', line 79

def detailed_operations
  @argument.detailed_operations.tap {|it| it[@operation] += 1}
end

#diff(wrt) ⇒ Object 



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# File 'lib/symbolic/function.rb', line 101

def diff(wrt)
  return 0 unless self.variables.member?(wrt)
  #chain rule
  @function.derivative(@argument)  * @argument.diff(wrt)
end

#eval ⇒ Object

simply dumps @argument in to the function – no gaurentee that the function will know how to handle it. Useful in some circumstances



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# File 'lib/symbolic/function.rb', line 93

def eval
  @function.call(@argument)
end

#name ⇒ Object 



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# File 'lib/symbolic/function.rb', line 67

def name
  @function.name
end

#subs(to_replace, replacement = nil) ⇒ Object 



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# File 'lib/symbolic/function.rb', line 83

def subs(to_replace, replacement=nil)
  if replacement == nil and to_replace.is_a?(Hash)
	super(to_replace)
  else
	@function[@argument.subs(to_replace, replacement)]
  end
end

#value ⇒ Object 



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# File 'lib/symbolic/function.rb', line 71

def value
  @function.call(@argument.value)
end

#variables ⇒ Object 



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# File 'lib/symbolic/function.rb', line 75

def variables
  @argument.variables
end