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I'm currently doing sentiment anaylisis with SVM algorithm linear kernel and TF-IDF. My data is not balanced

not balanced:

not balanced data

and I balanced data using SMOTE

balanced data:

balanced data

output without balanced data:

output without balanced data

output with balanced data:

output with balanced data

Why output without balanced data is more better than balanced data?

caeruleum
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  • Welcome to Cross Validated. I recommend that you have a look at the question [When is unbalanced data really a problem in Machine Learning?](https://stats.stackexchange.com/questions/283170/when-is-unbalanced-data-really-a-problem-in-machine-learning). – deemel Dec 23 '21 at 08:51

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