Build a benchmark model to understand feature importance

Optimal cutoff point for binary classification models

Note for programming with dplyr

Data visualisation with R ggplot2

Statistical tests to use for comparing means

Statistical test to compare proportions in R

Bayesian analysis for A/B test

Train many models in r using purrr package and collect results using broom package

Draw a work flow diagram in r

Some tools to visualise data in table format in R

SQL, R and Python Pandas syntax comparision for the basic queries.

Run python in R with the reticulate package

Examples of split-apply-combine in R

To create pivot table in R

A map view of COVID-19 cases in NSW by postcode

Quick demo to use a pwr package to run a marketing campaign experimental design and test the hypothesis.