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All Journal INFORMATIKA
Tsabita Rosyidah Putri
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Mechanical Engineering

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SEGMENTASI WILAYAH INDONESIA BERDASARKAN IHK MENGGUNAKAN AHC DAN SPECTRAL CLUSTERING Shafira Amanda Putri; Tsabita Rosyidah Putri; Trimono Trimono; Muhammad Idhom
Informatika: Jurnal Teknik Informatika dan Multimedia Vol. 5 No. 1 (2025): MEI : JURNAL INFORMATIKA DAN MULTIMEDIA
Publisher : LPPM Politeknik Pratama Kendal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/informatika.v5i1.1010

Abstract

Social and economic disparities between regions in Indonesia are still a serious problem, reflected in the high Gini Ratio and disparities in purchasing power. The Consumer Price Index (CPI) is an important indicator in measuring consumption patterns and price pressures between regions. This study aims to cluster 150 districts/cities based on consumption patterns through the CPI using the Agglomerative Hierarchical Clustering (AHC) and Spectral Clustering methods combined with Principal Component Analysis (PCA). The innovation lies in the comparison of the two clustering methods as well as the application of PCA to clarify the data structure. Evaluation with Silhouette Score and Davies-Bouldin Index showed that AHC gave the best results with four representative clusters (Silhouette: 0.76; DBI: 0.32), compared to Spectral Clustering with three clusters (Silhouette: 0.75; DBI: 0.54). Each cluster has different expenditure characteristics, useful for data-driven policy making. These results show that AHC is more effective in capturing interregional variations in consumption.
Co-Authors Muhammad Idhom Shafira Amanda Putri Trimono Trimono