Module: VectorSpace::Arithmetic

Defined in:
lib/vector_space/arithmetic.rb

Overview

These operations depend only upon addition and multiplication of the underlying values, so work in a vector space

Instance Method Summary collapse

Instance Method Details

#*(n) ⇒ Object

Scalar multiplication



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# File 'lib/vector_space/arithmetic.rb', line 14

def *(n)
  operate_on_values { |value| value * n }
end

#+(vector) ⇒ Object

Vector addition



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# File 'lib/vector_space/arithmetic.rb', line 5

def +(vector)
  if compatible_with?(vector)
    operate_on_values(vector) { |a, b| a + b }
  else
    raise ArgumentError, "can't add #{vector.inspect} to #{self.inspect}"
  end
end

#-(vector) ⇒ Object

Vector subtraction (by addition)



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# File 'lib/vector_space/arithmetic.rb', line 24

def -(vector)
  self + (-vector)
end

#-@ ⇒ Object

Additive inverse



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# File 'lib/vector_space/arithmetic.rb', line 19

def -@
  operate_on_values { |value| -value }
end

#/(n) ⇒ Object

Scalar division (by multiplication)



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# File 'lib/vector_space/arithmetic.rb', line 29

def /(n)
  self * (1.0 / n)
end