Class: Abs

Inherits:
Equation show all
Defined in:
lib/symcalc.rb

Overview

Implements the absolute value operation in SymCalc

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Equation

#*, #**, #+, #-, #/, #coerce, #derivative, #eval, #inspect, #simplify, #sub, #to_s

Constructor Details

#initialize(eq) ⇒ Abs

Returns a new instance of Abs.



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# File 'lib/symcalc.rb', line 908

def initialize eq
  @eq = to_equation(eq)
end

Instance Attribute Details

#eq ⇒ Object

Returns the value of attribute eq.



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# File 'lib/symcalc.rb', line 906

def eq
  @eq
end

Instance Method Details

#__derivative__(variable: nil) ⇒ Object 



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# File 'lib/symcalc.rb', line 920

def __derivative__ variable: nil
  return @eq / Abs.new(@eq) * @eq.derivative(variable: variable)
end

#__eval__(var_hash) ⇒ Object 



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# File 'lib/symcalc.rb', line 916

def __eval__ var_hash
  return @eq.eval(var_hash).abs
end

#__get_m_elements__(var_hash) ⇒ Object 



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# File 'lib/symcalc.rb', line 928

def __get_m_elements__ var_hash
  if var_hash.keys.include? self
    var_hash[self] += 1
  else
    var_hash[self] = 1
  end
  return var_hash
end

#__simplify__ ⇒ Object 



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# File 'lib/symcalc.rb', line 924

def __simplify__
  return Abs.new(@eq.__simplify__)
end

#__sub__(original, replacement) ⇒ Object 



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# File 'lib/symcalc.rb', line 948

def __sub__ original, replacement
  return to_equation(replacement) if self == to_equation(original)
  return Abs.new(@eq.__sub__(original, replacement))
end

#all_variables ⇒ Object 



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# File 'lib/symcalc.rb', line 944

def all_variables
  return @eq.all_variables
end

#display ⇒ Object 



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# File 'lib/symcalc.rb', line 912

def display
  return "|#{@eq.display}|"
end