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Journal : journal of applied informatics and computing

Optimizing Feature Extraction for Naïve Bayes Sentiment Analysis Achmad, Achmad; Budiman, Fikri
Journal of Applied Informatics and Computing Vol. 10 No. 1 (2026): February 2026
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jaic.v10i1.12041

Abstract

The rapid growth of e-commerce platforms such as Tokopedia has generated a large volume of user reviews containing diverse opinions about products and services. These reviews reflect consumer perceptions and provide valuable insights for business decision-making. This study aims to enhance sentiment analysis performance by optimizing the Naïve Bayes algorithm through a comparison of two feature extraction techniques, namely Bag of Words (BoW) and Term Frequency–Inverse Document Frequency (TF-IDF). The dataset consists of 5,400 Tokopedia product reviews obtained from the Kaggle platform, which are categorized into positive and negative sentiments. The research process includes text preprocessing consisting of text cleaning, case folding, tokenization, stopword removal, and stemming, feature extraction using Bag of Words (BoW) and Term Frequency–Inverse Document Frequency (TF-IDF), handling data imbalance using the Synthetic Minority Over-sampling Technique (SMOTE), and model training using the Naïve Bayes. The dataset is divided into 80% training data and 20% testing data, and model performance is evaluated using accuracy, precision, recall, and F1-score. The results show that BoW achieved the highest accuracy of 93%, while TF-IDF reached 83%, indicating that BoW provides more effective feature representation and more stable performance for Naïve Bayes-based sentiment analysis on this dataset.
Co-Authors -, Nasiri A. M. Yunus Wahid, A. M. Yunus Abd Mubaraq, S.E.,Sy. M.A Abidin, Siti Chaerani Fatimah Adriana Grahani Firdausy Agus Riwanto, Agus Ai Rosah Aisah Airlangga Surya Nagara al-Hamidy , Abu Dzarrin Alam, Andi Rifdah Auliyah Alfatih, Muhammad Wildan Ali, Misbahul Amaliyah, Amaliyah Amanda Cahyadewi, Felicia Amir Amir Anak Agung Istri Sri Wiadnyani Andi Alim, Andi Anggi Pramunendar, Ricardus Anisah, Lely Nur Ardelia, Aya Sofia As’ad, Muhammad Ridwan Azzahrah, Azzahrah Bakti, Fauziah P. Bonny P.W. Soekarno, Bonny P.W. Bustami Bustami Dany, Ahmad Denta Saputra, Fahrizal Dewa, Grabiella Elok Puri Maharani, Andina Emawati emawati ENDANG SUHENDANG Erlangga, Mikael Figo Bara EVRIANA, FRISCA Fauzi Ahmad Muda Fikri Budiman Fitria, Lailatul Hardiyani, Mitha Hayet, Hayet Hemi Fitriani, Hemi Hendrawan Hendrawan Husodo, Jadmiko Anom Ika Nawang Puspitawati Isharyanto Isharyanto Juliater Simamarta Junaedi, Wahyu Laksamana, Rio Layyinah, Rahmatika Lingga Lingga Lisdayanti, Lisdayanti Listiana, Arnetta M. Yamani Madalina, Maria Maggy T Suhartono Maskun Masyhur, Abdullah Al Memet Agustiar, Memet Metasari Kartika, Metasari Miftahul Ulum Muazzaroh, Faizatul Mubaraq, Abd Muchsin, Putri Rofifah Nabilah Muhammad Aldo Setiawan Muhammad Naufal Munadhir Munadhir Naswar Bohari Naswar, Naswar Nuraripah, Pia Nurdianti Nurdianti Nurhasanah, Via Oktavriana, Diah Ratri Pramarta, Pandhu Prawiro, Suharno Primadi Candra Susanto Rahman, Fadhlu Rejeki, Afifah Tri Resti Resti Richo Kurniawan, Ibnu Risamtyo, Adi Bintang Rivai, Andi Abil Hasan Saiful Aziz Samsul Arifin Sari, Intan Nurmala Simon Taka Nuhamara Soetrisno Hadi Sri Wahyuni Syamsuar Manyullei Syaranamual, Chintya Amelia Tambunan, Darwin Ula, Ade Isfi Ayatul Umar Fakhrizal, Irsyad Ummul Firdaus, Sunny Uni Kurnia Wahyudi Wahyudi Wasrin Syafii Wicaksono, Isa Agung Wisnu, Laksmidari Khansa Bella Yudiwanti Wahyu E. Kusumo