This week, Ellis Hughes and I go over various things you can do with columns in {tidyverse}.

Some of the topics we cover:

• Selecting columns by both name and number
• Using starts_with(), ends_with(), and match() functions to select columns with a specific words within their string
• Using where() to select and rows where a specific condition is met
• Several approaches to renaming columns
• Relocating columns to put columns in the order you’d like them to be in
• Differences between pluck() and pull() functions

To watch the screen cast, CLICK HERE.

To access our code, CLICK HERE.

This week, Ellis Hughes and I go over different methods to extracting random samples, by group, within {tidyverse}. We cover the different approaches for doing this using the slice_sample() function.

To watch our screen cast, CLICK HERE.

To access our code, CLICK HERE.

Ellis Hughes and I continue working on data cleaning and data engineering processes in {tidyverse}. This week, we go over various ways of creating window functions using the {zoo} package. These types of functions are very useful when dealing with signal processing data such as GPS, accelerators, or force plates. In our example, we use the Lahman baseball database to get the home runs per season for Albert Pujols (who recently hit his 700th career HR!) to show windows of rolling average and standard deviation.

If you have any data cleaning or engineering problems that are giving your trouble, feel free to reach out to us and maybe we can work on the problem in one of our upcoming episodes!

To watch our screen cast, CLICK HERE.

To access our code, CLICK HERE.

This week, Ellis Hughes and I wrap up our discussion on S4 objects by putting together the entire sports tournament and show how you can create S4 objects for modeling match ups between teams and then full tournament outcomes.

To watch our screen cast, CLICK HERE.

To access our code, CLICK HERE.

Ellis Hughes and I are back, this time discussing how to use S4 objects to build a sports tournament simulation in R. If you want a quick refresher on what an S4 object is and how to set one up, check out Episode 113.

To watch our screen cast, CLICK HERE.

To access our code, CLICK HERE.