交叉验证进阶:分组/时间序列/嵌套 CV
交叉验证进阶:分组/时间序列/嵌套 CV
1. 分组交叉验证
from sklearn.model_selection import GroupKFold# 按用户分组
groups data[user_id]
gkf GroupKFold(n_splits5)for train_idx, test_idx in gkf.split(X, y, groups):X_train, X_test X[train_idx], X[tes…
2026/7/8 14:04:51