내적가중치 합 (Weighted Sum)가중치 평균 (Weighted average)유사도 검사 (Similarity check)a= np.array([1,2,3])b =np.array([1,2,3])np.dot(a,b)#결과14# 과일 구입 총액f=np.array([30, 500, 70 ])p=np.array([1000, 170, 1500 ])f @ p#결과220000# 가중치 평균a = np.array([87, 93, 90, 100])b = np.array([88, 92, 93, 85])w = np.array([4, 4, 4,1 ])print('A:', a@w / np.sum(w))print('B:', b@w / np.sum(w))np.sum(w)#결과A: 90.76923076923077B: 90..