generated from LufsX/Challenge-kNN
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+14
-25
@@ -20,21 +20,6 @@ import numpy as np
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- Python: 3.10.12
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- numpy: 2.1.1
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"""
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# 计算待分类样本与训练集中所有样本的欧氏距离
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distances = [np.sqrt(np.sum((x - inX) ** 2)) for x in dataSet]
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# 根据距离排序,并获取前k个索引
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k_indices = np.argsort(distances)[:k]
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# 获取前k个邻居的标签
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k_nearest_labels = [labels[i] for i in k_indices]
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# 对标签进行投票,选择出现次数最多的标签
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from collections import Counter
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most_common = Counter(k_nearest_labels).most_common(1)
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# 返回投票最多的标签
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return most_common[0][0]
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"""
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@@ -57,18 +42,22 @@ name = "邓杰元"
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# 这里写自己的代码实现
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def classify0(inX, dataSet, labels, k=10):
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"""
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KNN 分类算法。
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# 计算待分类样本与训练集中所有样本的欧氏距离
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distances = [np.sqrt(np.sum((x - inX) ** 2)) for x in dataSet]
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Args:
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- inX (numpy array): 输入待分类的样本。
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- dataSet (numpy array): 训练数据集。
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- labels (list or numpy array): 训练集对应的标签。
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- k (int): kNN 算法参数,请**自行设置默认值**,评测时仅会使用其默认值,不修改默认值将**无法通过**评测,**成绩为零**。
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# 根据距离排序,并获取前k个索引
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k_indices = np.argsort(distances)[:k]
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# 获取前k个邻居的标签
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k_nearest_labels = [labels[i] for i in k_indices]
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# 对标签进行投票,选择出现次数最多的标签
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from collections import Counter
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most_common = Counter(k_nearest_labels).most_common(1)
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# 返回投票最多的标签
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return most_common[0][0]
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Returns:
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- int: 预测的分类标签。
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"""
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def load_data(file_path):
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