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About the monotonicity of bins. #89

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UTimeStrange opened this issue May 12, 2022 · 2 comments
Open

About the monotonicity of bins. #89

UTimeStrange opened this issue May 12, 2022 · 2 comments

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@UTimeStrange
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UTimeStrange commented May 12, 2022

Normally,it is essential for the bins besides missing to be monotonically increasing or decreasing on the badrate for better explainability. For exmple, the bigger a certain feature X1,the better chance it might be bad sample from experience of analyst, but the training data(too small or bad distribution) cannot show this priori experience.
Wondering if the binning function could automatic handle this, make the bin of a certain select X monotonous.

@ShichenXie
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分箱的坏样本率单调是业务要求,而不是基于分箱收敛条件的必然结果。而且很多变量在业务方面就是非单调的,例如年龄等。

@UTimeStrange
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分箱的坏样本率单调是业务要求,而不是基于分箱收敛条件的必然结果。而且很多变量在业务方面就是非单调的,例如年龄等。

确实是业务要求,正常跑就是不单调的,但是业务那边必须要单调,不然没法和客户解释。

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