I am Katherine G. Pe, a software engineer with about a decade experience in software development. In recent years, I have been studying Computer Science (post-graduate degrees). It's a rather broad field of study, so I have decided to focus on learning Data Science for various practical reasons.
A lot of my notes are for absolute beginners so anyone should be able to read these notes and understand them. You will find elementary-level Mathematical concepts, as well programming concepts which I find useful for Data Science.