R Essentials: A Beginner’s Guide to Data Analysis
Welcome
This book is intended for anyone interested in using R for applied statistical analysis and machine learning. I first encountered R (specifically RStudio) during my master’s studies, and it wasn’t an easy journey—especially as someone from a non-coding background. Initially, I was introduced to software like SPSS and STATA, and eventually R during my master’s studies. R felt unfamiliar and complex by comparison to the previous software. However, those who could use R proficiently seemed impressive to me, which motivated me to keep going. Surprisingly, the learning process became much easier as I keep using R.
Looking back, I wish I had known certain things earlier in my journey of learning R. This book is my attempt to provide those insights, covering the key concepts and tips I wish I had had when I started. I hope it sparks interest in R for others and helps them fully utilize its capabilities.
“When a man dies, his deeds come to an end except for three things: Sadaqah Jariyah (ceaseless charity); a knowledge which is beneficial, or a virtuous descendant who prays for him (for the deceased).”
I hope my effort in writing this book will be considered as a beneficial knowledge to others.
Finally, I would like to express my deepest love and gratitude to my late wife, Nurul Asmaq. You will always remain in my heart and in my thoughts — Al‑Fatihah.
To my son, Hanif, who gives me purpose, and to my parents, Tengku Mokhtar and Nor Malaysia: thank you. Writing this book meant taking time away from them, and even if my obsession with R and data analysis is hard to understand, their support has meant the world to me.