Question

Which of the following are valid methods of assigning data (in this case the value 9) to a variable in the R environment?

(Select all that apply, omit those that do not.)
a) i < - 9
b) 9 -> i
c) i = 9
d) o < - i
e) 9 = i

Answer 1

The valid methods of assigning the value 9 to a variable in R are using '9 -> i' and 'i = 9', while 'i < - 9' contains a typo and would be correct as 'i <- 9'. So the correct answer is option A.

Step-by-step explanation:

The question relates to different syntaxes for assigning values to variables in the R programming language. The valid methods to assign the value 9 to a variable in the R environment are:

• a) i < - 9: This is a valid assignment but has a syntax error due to the space between < and -. Without the space, i <- 9 would be correct.
• b) 9 -> i: This syntax is correct and assigns the value 9 to the variable i.
• c) i = 9: This is a valid and typical assignment statement in R.

The following are not valid methods for assigning data to a variable:

• d) o < - i: This is not an assignment of the value 9 but rather an incorrect attempt to assign the value of variable i to variable o and also has a syntax error similar to option a).
• e) 9 = i: This syntax is incorrect in R as it tries to assign the variable i to the value 9, which is not permissible.