You can use one of the following methods to create a vector with random numbers in R:

**Method 1: Create Vector with Random Values in Range**

#create vector of 10 random values between 1 and 20 runif(n=10, min=1, max=20)

**Method 2: Create Vector with Random Integers in Range**

#create vector of 10 random integers between 1 and 20 round(runif(n=10, min=1, max=20), 0)

The following examples show how to use each of these methods in practice.

**Method 1: Create Vector with Random Values in Range**

The following code shows how to create a vector of 10 random values between 1 and 20:

#make this example reproducible set.seed(1) #create vector with 10 random numbers between 1 and 20 random_vec <- runif(n=10, min=1, max=20) #view vector random_vec [1] 6.044665 8.070354 11.884214 18.255948 4.831957 18.069404 18.948830 [8] 13.555158 12.953167 2.173939

Note that **set.seed()** ensures that we will get the same random numbers each time.

If we remove **set.seed()**, the random numbers will be different each time we run the code.

**Method 2: Create Vector with Random Integers in Range**

The following code shows how to create a vector of 10 random integers between 1 and 50:

#make this example reproducible set.seed(1) #create vector with 10 random numbers between 1 and 50 random_vec <- round(runif(n=10, min=1, max=50), 0) #view vector random_vec [1] 14 19 29 46 11 45 47 33 32 4

Note that the **round()** function simply rounds the values created by the **runif()** function to the nearest whole number.

Also note that the **runif()** function generates random numbers, *including* the **min** and **max** values.

For example, it’s possible that the vector above could have included both 1 and 50.

Also note that it’s possible for the same number to appear multiple times in the vector when using this method.

**Additional Resources**

The following tutorials explain how to perform other common tasks in R:

How to Create an Empty Vector in R

How to Remove NA Values from Vector in R

How to Convert Matrix to Vector in R