R RStudio -- Class 4 -- Functions / Funções

About this Video

• Video Title: Functions and Arguments in R
• Channel: (Not specified in the transcript)
• Speakers: (Not specified in the transcript, but likely a single instructor)
• Duration: (Not specified in the transcript)

Introduction

This video tutorial introduces basic functions and arguments in the R programming language. The instructor demonstrates how to use functions like round, factorial, and mean for calculations, and explains how to utilize the sample function for generating random values. The core focus is on understanding function arguments and best practices for using them.

Key Takeaways

• Basic R Functions: The video showcases several built-in R functions, including round, factorial, mean, and sample.
• Function Arguments: The concept of function arguments is explained, emphasizing that arguments provide inputs to functions. The importance of clearly naming arguments is stressed, particularly when dealing with functions with multiple arguments.
• sample() Function: The sample() function's usage is demonstrated, showing how to obtain random samples from a data set using arguments like x (data), size (number of samples), replace (sampling with replacement), and prob (probabilities).
• Argument Naming Best Practices: The instructor advocates for explicitly naming function arguments, even when default values might seem unnecessary. This improves code readability and reduces errors, especially when functions have multiple arguments.
• Using args(): The args() function can be used to check the arguments a given function accepts.