Posts

Data exploration in R

These are some of the packages that I find useful for data exploration. Basically, this post serves more as my note for future reference. I will list out packages (and some awesome functions from that particular package) rather than specific functions.
Last updated on Aug 22, 2021 5 min read R

A summary of forcats package

I just watched a youtube video by Andrew Couch about his commonly used function in readr, stringr, and forcats packages. Although, I have used forcats package before, I realised that I have not fully utilised all of its function.
Last updated on May 18, 2021 8 min read R

Handling imbalanced data

Overview Imbalance data happens when there is unequal distribution of data within a categorical outcome variable. Imbalance data occurs due to several reasons such as biased sampling method and measurement errors.
Last updated on May 14, 2021 10 min read R, Machine Learning

Exponentially Weighted Average in Deep Learning

I have been reading about lost functions and optimisers in deep learning for the last couple of days when I stumble upon the term Exponentially Weighted Average (EWA). So, in this post I aims to explain my understanding of EWA.
Last updated on May 9, 2021 3 min read R, Deep Learning

Base R vs tidyverse

First of all, this write up is mean for a beginner in R. Things can be done in many ways in R. In facts, R has been very flexible in this regard compared to other statistical softwares.
Last updated on May 4, 2021 2 min read R

Loop vs apply in R

I have heard quite a several times that apply function is faster than loop function in R. Loop function is said to be inefficient, though in certain situation loop is the only way.
Last updated on May 4, 2021 1 min read R

How many Malaysian should be vaccinated to get herd immunity from COVID-19?

Recently I have read an article that the Malaysian government have made a deal with Pfizer for 6.4 million Malaysian to be vaccinated. So, I am wondering what is the minimal number of people should be vaccinated.
Last updated on Dec 7, 2020 3 min read Epidemiology