41 lines
1.1 KiB
Python
41 lines
1.1 KiB
Python
s = "Hello"
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for char in s:
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print(f"字符'{char}'的ASCII码为: {ord(char)}")
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print(f"ASCII码65对应的字符为: {chr(65)}")
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##图像是规则数值矩阵易处理，文本是离散符号序列，需理解语义更难
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# 题目3
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A = [3, 4]
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B = [1, 2]
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def vector_add(a, b):
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return [x + y for x, y in zip(a, b)]
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def scalar_multiply(scalar, vector):
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return [scalar * x for x in vector]
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def vector_norm(vector):
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return sum(x**2 for x in vector) ** 0.5
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print("题目3:")
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print("A + B =", vector_add(A, B))
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print("2 × A =", scalar_multiply(2, A))
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print("|A| =", vector_norm(A))
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A4 = [1, 2, 3]
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B4 = [4, 5, 6]
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def dot_product(a, b):
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return sum(x * y for x, y in zip(a, b))
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def cosine_similarity(a, b):
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norm_a = vector_norm(a)
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norm_b = vector_norm(b)
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if norm_a == 0 or norm_b == 0:
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return 0.0
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return dot_product(a, b) / (norm_a * norm_b)
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print("\n题目4:")
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print("A · B =", dot_product(A4, B4))
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print("余弦相似度 =", cosine_similarity(A4, B4))
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A5 = [1, 0]
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B5 = [0, 1]
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print("\n题目4 第3问:")
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print("A = [1, 0], B = [0, 1] 的余弦相似度 =", cosine_similarity(A5, B5)) |