Online Seminar #29 - Data Wrangling for Data Visualization with COVID-19 Data

Once you get your data, more often than not, you'd find a need to clean and transform the data before even visualizing it to make any sense. We call this task Data Wrangling.

In this seminar, I'm going to introduce a few commonly used techniques to clean and transform data with COVID-19 data.

Transform Wide data to Long data
Convert Text to Date data type
Calculate the difference from the previous row with Lag function
Join with another data frame

Knowing these simple techniques is essential for creating effective visualizations.

Video

Here is the recorded video.

Slides

Here is an instructional slides that this seminar was based on. It has a step by step instructions so you can use it for your self-study or share with your team for a group studying!