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Introduction to R Syntax

We mentioned Vectors when we introduced data types earlier. In R, vectors are a list-like structure that contain items of the same data type.

Take a look here:

spring_months <- c("March", "April","May","June")

In the example above, we created a new variable with the value of a new vector. We created this vector by separating four character strings with a comma and wrapping them inside c().

A few things you should know how to do with vectors:

  • You can check the type of elements in a vector by using typeof(vector_name)
  • You can check the length of a vector by using length(vector_name)
  • You can access individual elements in the vector by using [] and placing the element position inside the brackets. For example, if we wanted to access the second element we would write: vector_name[2]. Note: In R, you start counting elements at position one, not zero.



Create a numeric vector named phone that contains your phone number as three numbers: your area code, the next three digits, and then the last four.

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