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hands-on-machine-learning's Issues

第二章原作者有个坑没提到

总的来说原作者第二章大纲思路是清晰的,细节思路则有点乱。

其中【4.1 Data Cleaning-数据清洗】,sample_incomplete_rows["total_bedrooms"].fillna(median, inplace=True)
total_bedrooms不能用全体的中位数来填充,因为total_bedrooms和total_rooms紧密相关,而所有nan的total_bedrooms对应的total_rooms则波动很大,如果都用全体中位数来填充,这一百多条记录就成了污染,还不如直接dropna。严谨一点的话,可以取total_rooms相同或接近(±20%之类)的记录的total_bedrooms或其均值/中位数。

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