# How to Use Min and Max Functions in R (With Examples)

You can use the min() and max() functions in R to quickly calculate the minimum and maximum values in a vector.

```#find minimum value
min(x)

#find maximum value
max(x)
```

The following examples show how to use these functions in practice.

### Example 1: Max & Min of Vector

The following code shows how to find the minimum and maximum values of a vector:

```#define vector
x <- c(2, 3, 4, 4, 7, 12, 15, 19, 22, 28, 31, 34)

#find minimum value
min(x)

 2
#find maximum value
max(x)

 34
```

Note that if you have missing values in the vector, you must specify na.rm=TRUE to ignore missing values when calculating the minimum and maximum:

```#define vector with some missing values
x <- c(2, 3, 4, 4, NA, 12, NA, 19, 22, 28, 31, 34)

#find minimum value
min(x, na.rm=TRUE)

 2

#find maximum value
max(x, na.rm=TRUE)

 34
```

### Example 2: Max & Min of Entire Data Frame

The following code shows how to find the minimum and maximum values of an entire data frame:

```#define data frame
df <- data.frame(a=c(1, 3, 4, 6, 8, 9),
b=c(7, 8, 8, 7, 13, 16),
c=c(11, 13, 13, 18, 19, 22),
d=c(12, 16, 18, 22, 29, 38))

#find minimum value
min(df)

 1

#find maximum value
max(df)

 38```

### Example 3: Max & Min of Column in Data Frame

The following code shows how to find the minimum and maximum values of a specific column in a data frame:

```#define data frame
df <- data.frame(a=c(1, 3, 4, 6, 8, 9),
b=c(7, 8, 8, 7, 13, 16),
c=c(11, 13, 13, 18, 19, 22),
d=c(12, 16, 18, 22, 29, 38))

#find minimum value of column c
min(df\$c)

 11

#find maximum value of column c
max(df\$c)

 22```

### Example 4: Max & Min of Several Columns in Data Frame

The following code shows how to find the minimum and maximum values of several columns in a data frame:

```#define data frame
df <- data.frame(a=c(1, 3, 4, 6, 8, 9),
b=c(7, 8, 8, 7, 13, 16),
c=c(11, 13, 13, 18, 19, 22),
d=c(12, 16, 18, 22, 29, 38))

#find minimum value in columns a, b, and d
apply(df[ , c('a', 'b', 'd')], 2, min)

a  b  d
1  7 12

#find maximum value in columns a, b, and d
apply(df[ , c('a', 'b', 'd')], 2, max)

a  b  d
9 16 38 ```