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I'm working on an imbalanced class data set (200 samples) with 2 classes, first class has 50 sample and second has 150 sample.

My questions:

  1. When I use SMOTE technique on my data set my total dataset samples will be greater than 200 or smaller?
  2. Is there standard parameters value about SMOTE technique or not?
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First of all, if all your variables are numerical then you can you SMOTE; otherwise you should use SMOTENC.

Answers: 1- Your classes are 150-50, then SMOTE gives you 150-150. So, YES; your total dataset sample will be 300.

2- You can use the default parameters; it works well in most of the problems. However, you can play with random_state and k_neighbors. All parameters have been explained here: imblearn.over_sampling.SMOTE

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  • $\begingroup$ Thanks for your time and advises $\endgroup$
    – motevalizadeh
    Dec 11, 2019 at 12:17

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