你好这是我收到的错误信息,请帮我找到可能出现问题的地方。
<ipython-input-52-2e0822fefabf> in main()
11 k = 3
12 for x in range(len(testSet)):
---> 13 neighbors = getNeighbors(trainingSet, testSet[x], k)
14 result = getResponse(neighbors)
15 predictions.append(result)
<ipython-input-48-401931b7da2b> in getNeighbors(trainingSet, testInstance, k)
4 length = len(testInstance)-1
5 for x in range(len(trainingSet)):
----> 6 dist = euclideanDistance(testInstance, trainingSet[x], length)
7 distances.append((trainingSet[x], dist))
8 distances.sort(key=operator.itemgetter(1))
<ipython-input-45-f927a4da7f1b> in euclideanDistance(instance1, instance2, length)
3 distance = 0
4 for x in range(length):
----> 5 distance += pow((instance1[x] - instance2[x]), 2)
6 return math.sqrt(distance)
TypeError: unsupported operand type(s) for -: 'str' and 'str'
答案 0 :(得分:1)
这些值:testInstance, trainingSet[x]
不是int
或float
。它们应该是,因为你不能从字符串中减去字符串。
你可以这样做:
neighbors = getNeighbors(int(trainingSet), int(testSet[x]), k)
或者如果它们是浮动的话:
neighbors = getNeighbors(float(trainingSet), float(testSet[x]), k)