generated from LufsX/Experiment-LogReg
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+27
-6
@@ -56,9 +56,11 @@ def predict_logreg(inX, weights):
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# 将概率转为标签
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return 1 if prob >= 0.5 else 0
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import numpy as np
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def load_data(filepath):
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"""
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从文件中加载数据。
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从文件中加载数据,处理缺失数据,并将 '?' 替换为列的均值。
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Args:
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- filepath (str): 数据文件路径。
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@@ -69,19 +71,38 @@ def load_data(filepath):
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"""
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data = []
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labels = []
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# 读取数据
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with open(filepath, 'r') as file:
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for line in file:
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line = line.strip().split()
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if not line:
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continue
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# 将特征转换为浮点型
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features = list(map(float, line[:-1]))
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# 将标签提取出来
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label = int(line[-1])
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# 将特征转换为浮动数组
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features = line[:-1] # 去除标签部分
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# 用特征中的均值替换 '?',并转换为 float
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features = [float(f) if f != '?' else None for f in features]
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# 将数据和标签分别加入到列表
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data.append(features)
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labels.append(label)
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return np.array(data), np.array(labels)
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# 将列表转换为numpy数组
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data = np.array(data)
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labels = np.array(labels)
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# 计算每列的均值,并用均值替换 None
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col_means = np.nanmean(data, axis=0) # 计算每列的均值,忽略 NaN
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# 将 None 替换为对应的列均值
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for i in range(data.shape[1]):
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data[:, i] = np.where(np.isnan(data[:, i]), col_means[i], data[:, i])
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return data, labels
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if __name__ == "__main__":
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# 加载训练集
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