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-(v) public

Vector subtraction.

# File lib/matrix.rb, line 1712
  def -(v)
    case v
    when Vector
      Vector.Raise ErrDimensionMismatch if size != v.size
      els = collect2(v) {|v1, v2|
        v1 - v2
      }
      self.class.elements(els, false)
    when Matrix
      Matrix.column_vector(self) - v
    else
      apply_through_coercion(v, __method__)
    end
  end

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