Is it better to add new features or modify objective function in considering a new aspect for classification ?

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Tarek Abd El-Hafeez

I think adding a new features (relevant and effective) and the dataset is big, is more useful and give an efficient results than modifying the objective function.

Yasin Kaya

Experimentally, you can try both suggestions and compare the results. Whichever one gets the best results, you use it. You interpret this in your work.