Comparison of Annual Inflation Percentage Prediction in West Java Using Newton-Gregory Forward Interpolation and Cubic Spline

• Authors: Viona Prisyella Balqis , Muhammad Herlambang Prakasa Yudha , Sri Purwani
• Languages of publication: EN

Abstracts

EN

Inflation is the rise in prices of those, fundamental need of society. The occurrence of inflation can be measured by the consumer price index (CPI). The increase in inflation was due to several expenditures based on people's needs. If inflation is high, it can affect competitiveness in the sectors of the industry. The purpose of this study is to compare functions describing the movement of inflation data in West Java using Newton-Gregory Forward Interpolation Method and the Cubic Spline Interpolation Method. Based on the results of the study, it is found that both methods result in smooth functions. However, in the Cubic Spline Interpolation Method there is no significant change in the value of the function/data within each subinterval. Meanwhile, in Newton-Gregory Forward Interpolation, there are significant changes in the value of the function/data between the ends of the right-hand side subintervals. This implies that errors of the function produced by Cubic Spline interpolation are less than those of the other one. Therefore, the Cubic Spline Interpolation Method is better than Newton-Gregory in predicting the inflation percentage data in West Java.

Keywords

EN

Cubic Spline Interpolation; Inflation; Newton-Gregory Forward Interpolation; Prediction

Discipline

• INFORMATICS: INFORMATICS

• Publisher: Scientific Publishing House „DARWIN”
• Journal: World Scientific News
• Year: 2022
• Volume: 165
• Pages: 130-141

Contributors

author

Viona Prisyella Balqis

• Department of Mathematics, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Jl. Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang, West Java Province, 45363, Indonesia

author

Muhammad Herlambang Prakasa Yudha

• Department of Mathematics, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Jl. Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang, West Java Province, 45363, Indonesia

author

Sri Purwani

• Department of Mathematics, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Jl. Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang, West Java Province, 45363, Indonesia

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• Document Type: article