Data and graphs related to air pollution.

Analisis regresi linear sederhana untuk melihat hubungan penghasilan dengan tingkat kebahagiaan.

This document describes the process of extracting and tidying QUALIS grade data for scientific journals from a PDF file. It includes loading libraries, defining regular expressions, cleaning the text, and extracting structured data using R. This tidy data can be merged with external sources for further analysis. The PDF used in this project is publicly available, and the methodology is fully reproducible.