method

angle_with

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angle_with(v) public

Returns an angle with another vector. Result is within the [0…Math::PI].

Vector[1,0].angle_with(Vector[0,1])
# => Math::PI / 2

Show source

# File lib/matrix.rb, line 2065
  def angle_with(v)
    raise TypeError, "Expected a Vector, got a #{v.class}" unless v.is_a?(Vector)
    Vector.Raise ErrDimensionMismatch if size != v.size
    prod = magnitude * v.magnitude
    raise ZeroVectorError, "Can't get angle of zero vector" if prod == 0

    Math.acos( inner_product(v) / prod )
  end

angle_with

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