设计思路

输出结果

实现代码

F:\Program Files\Python\Python36\lib\site-packages\matplotlib\axes\_axes.py:6462: UserWarning: The 'normed' kwarg is deprecated, and has been replaced by the 'density' kwarg.

 warnings.warn("The 'normed' kwarg is deprecated, and has been "

0    284315

1       492

Name: Class, dtype: int64

Default 方法

Undersampling RandomUnderSampler 方法

F:\Program Files\Python\Python36\lib\site-packages\imblearn\under_sampling\_prototype_selection\_nearmiss.py:178: UserWarning: The number of the samples to be selected is larger than the number of samples available. The balancing ratio cannot be ensure and all samples will be returned.

 "The number of the samples to be selected is larger"

Undersampling NearMissV1 方法

F:\Program Files\Python\Python36\lib\site-packages\sklearn\svm\_base.py:977: ConvergenceWarning: Liblinear failed to converge, increase the number of iterations.

 "the number of iterations.", ConvergenceWarning)

Undersampling NearMissV2 方法

Undersampling NearMissV3 方法

Undersampling ClusterCentroids 方法

Undersampling TomekLinks 方法

Undersampling EditedNearestNeighbours 方法

数据清洗后大类样本数量

Original:  227451

After Tomek Link:  227429

After ENN:  227326

Oversampling RandomOverSampler 方法

Oversampling SMOTE 方法

Oversampling ADASYN 方法