How to Print a Vector in R?

Vectors are a common data structure in R. We use vectors to store a sequence of values of the same type. In this tutorial, we will look at how to print a vector in R with the help of some examples.

You can use the R built-in print() function to print the contents of a vector in R. Pass the vector you want to print as an argument to the function. The following is the syntax –

# display vector 
print(vec)

It prints the vector in a single line with elements separated by a space.

Examples

Let’s look at some examples of displaying a vector in R. First, we will create a vector that we will be using throughout this tutorial.

# create a vector
vec <- c(10, 20, 30, 40, 50)

We now have a vector containing some numbers.

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Print an R vector

Let’s use the above function to print the vector, vec created above.

# display the vector
print(vec)

Output:

[1] 10 20 30 40 50

We get the contents of the vector as the output.

Print vector as a string

Let’s now print the above vector as a string. You can use the paste() function in R to print the contents of a vector as a single string. You can also specify a separator to use between the vector values with the collapse parameter of the paste() function.

For example, let’s convert the above vector to a string where the values are separated by a single space.

# display vector as string
paste(vec, collapse = " ")

Output:

'10 20 30 40 50'

You can see that we get a string output with the vector values.

Print vector with values separated by comma

Let’s now use the paste() function demonstrated above to print the values as a string separated by a comma.

# display vector as string with comma as separator
paste(vec, collapse = ",")

Output:

'10,20,30,40,50'

You can see that the vector values in the output are comma-separated.

Alternatively, you can also use the cat() function in R to display values in a vector as comma-separated values.

# display vector as comma separated values
cat(vec, sep=",")

Output:

10,20,30,40,50

You can see that we get the desired result. Unlike the output from the paste() function, the output from the cat() function doesn’t have any quotes.

Print vector in multiple lines

You can use the cat() function with '\n' as the value for the sep parameter to display vector values on separate lines in the output.

# display vector values line by line
cat(vec, sep = "\n")

Output:

You can see that the vector values are displayed in multiple lines.

Author

Piyush Raj

Piyush is a data professional passionate about using data to understand things better and make informed decisions. He has experience working as a Data Scientist in the consulting domain and holds an engineering degree from IIT Roorkee. His hobbies include watching cricket, reading, and working on side projects.

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