My plan to manually create HTML and JSON files for three astronomy books, import them into R, and compare the resulting data frames.

Time series forecasting of monthly Thai agricultural export value (2013-2023) in R, comparing Naive, ETS, Holt-Winters, ARIMA and SARIMA with residual diagnostics and 12-month prediction intervals.

Studi kasus pengolahan tagihan listrik 8 pelanggan PT PLN dengan R. Tarif ditentukan dari daya dan status subsidi, lalu dihitung biaya pemakaian, PPJ 5%, total tagihan, dan kategori Hemat/Sedang/Tinggi, lengkap dengan visualisasi ggplot2.

This class note covers descriptive analysis of a real dataset in R, from loading the data to an APA-style report. Students code along on their own laptops with the generated dataset.

Math problems of the day for 10/15/26.