更新 function.py
Gitea Actions Test / Challenge-Actions (push) Successful in 12s

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2024-11-13 18:31:14 +08:00
parent af5f30c327
commit 85c3ac6b71
+19 -24
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@@ -5,35 +5,30 @@ id = "202210423230"
name = "尹家立"
def load_data(filepath):
data, labels = [], []
with open(filepath, 'r') as f:
for line in f:
line = line.strip().split()
if len(line) >= 1 and line[-1].isdigit():
# 将特征值中的缺失值(“?”)替换为0,并将其余项转换为浮点数
line_data = [0 if x == '?' else float(x) for x in line[:-1]]
data.append(line_data)
# 保留标签原始的三分类标签
labels.append(int(line[-1]))
"""
从文件中加载数据,处理缺失值,并确保标签维持原始三分类标签。
data = np.array(data)
labels = np.array(labels)
Args:
- filepath (str): 数据文件路径。
# 检查特征数量
num_features = data.shape[1]
Returns:
- np.array: 特征数据。
- np.array: 标签数据。
"""
# 读取数据,将 '?' 替换为 NaN
data = np.genfromtxt(filepath, delimiter=' ', dtype=float, missing_values='?', filling_values=np.nan)
# 特征选择:去掉特征3(索引2)和特征24~28(索引23~26),确保索引有效
indices_to_delete = [2] # 特征3
if num_features > 24: # 确保特征数量足够
indices_to_delete += list(range(24, 27)) # 特征24到27(索引23到26)
# 用列均值填补缺失值
nan_indices = np.isnan(data)
col_means = np.nanmean(data, axis=0)
data[nan_indices] = np.take(col_means, np.where(nan_indices)[1])
# 删除指定特征列
data = np.delete(data, indices_to_delete, axis=1)
# 分离特征和标签
X = data[:, :-1]
y = data[:, -1]
# 保留三分类标签
target_variable = labels # 不再合并任何标签,保持三分类
return data, target_variable
# 确保标签值保持三分类标签(例如,假设标签值分别为 1:存活,2:死亡,3:安乐死)
return X, y