SKLearn MinMaxScaler - 仅缩放特定列 [英] SKLearn MinMaxScaler - scale specific columns only

问题描述

我想使用 MinMaxScaler 缩放 Pandas 数据帧中的一些(但不是全部)列.我该怎么做?

I'd like to scale some (but not all) of the columns in a Pandas dataFrame using a MinMaxScaler. How can I do it?

推荐答案

从 sklearn >= 0.20 开始，您可以使用 列转换器

Since sklearn >= 0.20 you can do it using Column Transformer

standard_transformer = Pipeline(steps=[
        ('standard', StandardScaler())])

minmax_transformer = Pipeline(steps=[
        ('minmax', MinMaxScaler())])


preprocessor = ColumnTransformer(
        remainder='passthrough', #passthough features not listed
        transformers=[
            ('std', standard_transformer , ['z']),
            ('mm', minmax_transformer , ['x','y'])
        ])

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