Variables and Objects

# Defining two variables
a <- 1
b <- 2
# Entering the name leads to printing the content of the variable
a

[1] 1

# Showing the variables defined:
ls()

[1] "a" "b"

# Removing variables:
rm(a,b)
# Checking the existence of a variable
exists("a")

[1] FALSE

# "Hidden" variables
a <- 1
b <- 2
x <- 3
y <- 4
z <- 42
.zzyx <- 1412
ls()

[1] "a" "b" "x" "y" "z"

rm(list=ls())
ls()

character(0)

ls(all=TRUE)

[1] ".pbd_env" ".zzyx"   

• R file: variables.R
• Rmarkdown file: variables.Rmd
• Jupyter notebook file: variables.ipynb
• Interactive version of the Jupyter notebook (shuts down after 60s):
  
• Interactive version of the Jupyter notebook (sign in required):