Nurul Asyikin, Zamrus; Nurul Najihah, Mohamad; Mohd Hirzie, Mohd Rodzhan (Institute of Engineering Mathematics, Universiti Malaysia Perlis, 2022-12)
The Air Pollution Index (API) of Malaysia has increased consistently in recent decades, becoming a serious environmental issue concern. In this paper, the daily integer value time series data for API in Penang and Sarawak ...