使用欠采样和过采样的不平衡分类 pytorch python

Question

I want to use oversampling and under sampling techniques together I have 6 classes with number of samples as following: class 0 250000 class 1 48000 class 2 40000 class 3 38000 class 4 35000 class 5 7000 I want to use smot to make all classes balance and相等相同的尺寸class 0 40000 class 1 40000 class 2 40000 class 3 40000 0000 class 440000型号88398112121212121212195188 4400 y 40000 y44188888888888888888888888888888888888888888888888888888888888888888888888888.

Answer 1

我试试这个

ros = RandomUnderSampler()
X, y=ros.fit_resample(mydata, labels)
strategy = {0:40000, 1:40000, 2:40000, 3:40000, 4:40000, 5:40000}
over = SMOTE(sampling_strategy=strategy)
X, y=over.fit_resample(X, y)