Class: MathViz::Operation::Unary

Inherits:
MathViz::Operation show all
Defined in:
lib/mathviz.rb

Overview

Display and processing for single-value operators

Instance Attribute Summary

Attributes inherited from Term

#name

Instance Method Summary collapse

Methods inherited from MathViz::Operation

#color, #shape, #term

Methods inherited from Term

binop, #color, #data, #label, list_terms, name_terms!, #shape, #style, #to_i, #to_s, unop

Methods included from Measured

#per, #unit, #with_units

Methods included from Units::Class

#included, #new_units

Constructor Details

#initialize(a, op) ⇒ Unary

Returns a new instance of Unary.



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# File 'lib/mathviz.rb', line 499

def initialize(a, op)
  super()
  @a = term(a)
  @op = op
end

Instance Method Details

#constant? ⇒ Boolean

Forward to contained value

Returns:

  • (Boolean) 


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# File 'lib/mathviz.rb', line 530

def constant?
  @a.constant?
end

#long ⇒ Object

Debugging method; return string of name and value.



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# File 'lib/mathviz.rb', line 506

def long
  n = @name && (@name + " = ")
  "(#{n}#{@a} #{@op} = #{to_f})"
end

#to_dot(g) ⇒ Object

Extend Graphviz g with a representation of this object, and incoming connections



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# File 'lib/mathviz.rb', line 512

def to_dot(g)
  super
  (g[@a.node] >> g[node]) [:arrowhead => :normal, :headlabel => @op.to_s, :labeldistance => '2']
  @a.to_dot(g) if (@a.respond_to?(:name) && @a.name.nil?)
end

#to_f ⇒ Object

Apply the operator to create the derived value.



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# File 'lib/mathviz.rb', line 519

def to_f
  return MathViz::Infinity unless @a.to_f.finite?
  @a.to_f.__send__(@op)
end

#units ⇒ Object

Forward to contained value



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# File 'lib/mathviz.rb', line 525

def units
  @a.units
end