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

Method 1: Create Data Frame with Random Values in Range

#create data frame of 10 random values between 1 and 20
df <- as.data.frame(matrix(runif(n=10, min=1, max=20), nrow=5))

Method 2: Create Data Frame with Random Integers in Range

#create data frame of 10 random integers between 1 and 20
df <- as.data.frame(matrix(round(runif(n=10, min=1, max=20), 0), nrow=5))

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

Method 1: Create Data Frame with Random Values in Range

The following code shows how to create a data frame with 5 rows consisting of 10 random values between 1 and 20:

#make this example reproducible
set.seed(1)

#create data frame with 10 random numbers between 1 and 20
df <- as.data.frame(matrix(runif(n=10, min=1, max=20), nrow=5))

#define column names
names(df) <- c('A', 'B')

#view data frame
df

          A         B
1  6.044665 18.069404
2  8.070354 18.948830
3 11.884214 13.555158
4 18.255948 12.953167
5  4.831957  2.173939

The result is a data frame with 5 rows and 2 columns, where each value in the data frame is between 1 and 20.

Method 2: Create Data Frame with Random Integers in Range

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

#make this example reproducible
set.seed(1)

#create data frame with 10 random integers between 1 and 50
df <- as.data.frame(matrix(round(runif(n=10, min=1, max=50), 0), nrow=5))

#define column names
names(df) <- c('A', 'B')

#view data frame
df

   A  B
1 14 45
2 19 47
3 29 33
4 46 32
5 11  4

The result is a data frame with 5 rows and 2 columns, where each value in the data frame is an integer between 1 and 50.

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

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

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