Working with Environments (1)

The environment variable type is similar to a list in that it can contain other variables.

You can create a new environment using new.env() (docs).

Variables can be added to the environment using the same syntax as for lists, that is, you can use the $ and [[ operators.

แบบฝึกหัดนี้เป็นส่วนหนึ่งของหลักสูตร

Object-Oriented Programming with S3 and R6 in R

Create a new environment named env.
Use the dollar operator to add an element to env named perfect that contains the first three perfect numbers, 6, 28, 496.
Use the double square bracket operator to add an element to env named bases that contains the letters of DNA bases, A, C, G, T.

ลองทำแบบฝึกหัดนี้โดยเติมโค้ดตัวอย่างนี้ให้สมบูรณ์

# Define a new environment
env <- 
  
# Add an element named perfect
  

# Add an element named bases