The impact of pre-processing and feature selection on text classification

Suryanti, Awang and Nur Syafiqah, Mohd Nafis (2020) The impact of pre-processing and feature selection on text classification. In: Advances in Electronics Engineering: Proceedings of the ICCEE 2019 , 29-30 April 2019 , Kuala Lumpur, Malaysia. pp. 269-280., 619. ISBN 978-981-15-1289-6

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Abstract

Nowadays text classification is dealing with unstructured and high-dimensionality text document. These textual data can be easily retrieved from social media platforms. However, this textual data is hard to manage and process for classification purposes. Pre-processing activities and feature selection are two methods to process the text documents. Therefore, this paper is presented to evaluate the effect of pre-processing and feature selection on the text classification performance. A tweet dataset is utilized and pre-processed using several combinations of pre-processing activities (tokenization, removing stop-words and stemming). Later, two feature selection techniques (Bag-of-Words and Term Frequency-Inverse Document Frequency) are applied on the pre-processed text. Finally, Support Vector Machine classifier is used to test the classification performances. The experimental results reveal that the combination of pre-processing technique and TF-IDF approach achieved greater classification performances compared to BoW approach. Better classification performances hit when the number of features is decreased. However, it is depending on the number of features obtained from the pre-processing activities and feature selection technique chosen.

Item Type:	Conference or Workshop Item (Lecture)
Uncontrolled Keywords:	Unstructured; High-dimensional; Pre-processing; Text classification; Feature selection
Subjects:	T Technology > T Technology (General)
Faculty/Division:	Faculty of Computer System And Software Engineering Institute of Postgraduate Studies
Depositing User:	Dr. Suryanti Awang
Date Deposited:	26 Feb 2021 02:24
Last Modified:	08 Jan 2024 04:38
URI:	http://umpir.ump.edu.my/id/eprint/30799
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