# How to Use the Table Function in R (With Examples)

The table() function in R can be used to quickly create frequency tables.

This tutorial provides examples of how to use this function with the following data frame in R:

```#create data frame
df <- data.frame(player = c('AJ', 'Bob', 'Chad', 'Dan', 'Eric', 'Frank'),
position = c('A', 'B', 'B', 'B', 'B', 'A'),
points = c(1, 2, 2, 1, 0, 0))

#view data frame
df

player position points
1     AJ        A      1
2    Bob        B      2
4    Dan        B      1
5   Eric        B      0
6  Frank        A      0```

### Example 1: Frequency Table for One Variable

The following code shows how to create a frequency table for the position variable in our data frame:

```#calculate frequency table for position variable
table(df\$position)

A B
2 4
```

From the output we can observe:

• 2 players in the data frame have a position of ‘A
• 4 players in the data frame have a position of ‘B

### Example 2: Frequency Table of Proportions for One Variable

The following code shows how to use prop.table() to create a frequency table of proportions for the position variable in our data frame:

```#calculate frequency table of proportions for position variable
prop.table(table(df\$position))

A         B
0.3333333 0.6666667
```

From the output we can observe:

• 33.33% of players in the data frame have a position of ‘A
• 66.67% of players in the data frame have a position of ‘B

Note that in a proportion table the sum of the proportions will always be equal to 1.

### Example 3: Frequency Table for Two Variables

The following code shows how to create a frequency table for the position and points variable in our data frame:

```#calculate frequency table for position and points variable
table(df\$position, df\$points)

0 1 2
A 1 1 0
B 1 1 2
```

From the output we can observe:

• 1 player in the data frame has a position of ‘A‘ and 0 points
• 1 player in the data frame has a position of ‘A‘ and 1 point
• 0 players in the data frame have a position of ‘A‘ and 2 points
• 1 player in the data frame has a position of ‘B‘ and 0 points
• 1 player in the data frame has a position of ‘B‘ and 1 point
• 2 players in the data frame have a position of ‘B‘ and 2 points

### Example 4: Frequency Table of Proportions for Two Variables

The following code shows how to create a frequency table of proportions for the position and points variable in our data frame:

```#calculate frequency table of proportions for position and points variable
prop.table(table(df\$position, df\$points))

0         1         2
A 0.1666667 0.1666667 0.0000000
B 0.1666667 0.1666667 0.3333333
```

From the output we can observe:

• 16.67% of players in the data frame have a position of ‘A‘ and 0 points
• 16.67% of players in the data frame have a position of ‘A‘ and 1 point
• 0% of players in the data frame have a position of ‘A‘ and 2 points
• 16.67% of players in the data frame have a position of ‘B‘ and 0 points
• 16.67% of players in the data frame have a position of ‘B‘ and 1 point
• 33.3% of players in the data frame have a position of ‘B‘ and 2 points

Note that we can also use the options() function to specify how many decimals to show in the proportion table:

```#only display two decimal places
options(digits=2)

#calculate frequency table of proportions for position and points variable
prop.table(table(df\$position, df\$points))

0    1    2
A 0.17 0.17 0.00
B 0.17 0.17 0.33```