+

# File lib/matrix.rb, line 878
    def +(other)
      case other
      when Numeric
        Scalar.new(@value + other)
      when Vector, Matrix
        Scalar.Raise WrongArgType, other.class, "Numeric or Scalar"
      when Scalar
        Scalar.new(@value + other.value)
      else
        x, y = other.coerce(self)
        x + y
      end
    end