A vector is a one-dimensional data structure used to store data of the same type in R. Numeric vectors are commonly used to store a sequence of numbers. In this tutorial, we will look at how to get the maximum value in an R vector with the help of some examples.

## How to get the max value in a vector in R?

You can use the R `max()`

function to get the maximum value in a vector. Pass the vector as an argument to the function. The following is the syntax –

# get the max value in a vector max(x, na.rm=FALSE)

The following are the arguments that you can give to the `max()`

function in R.

- x – The vector for which you want to compute the max value.
- na.rm – (
*Optional argument*) Indicates whether to remove missing values before computing the maximum. It is`FALSE`

by default.

The function returns the max value in the passed vector.

## Examples

Let’s look at some examples of using the above method to get the max value in a vector.

### Maximum value in a numeric vector

Let’s create a vector of numbers (and without any `NA`

values) and apply the `max()`

function.

# create a vector of numbers vec <- c(1, 3, 5, 4) # max value in vector max(vec)

Output:

5

We get 5 as the max value in the above vector, which is the correct answer.

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What would happen if there are some `NA`

present values in the vector?

Let’s find out.

First, we will create a vector with some `NA`

values and then apply the `max()`

function without any additional arguments.

# create a vector with NA values vec <- c(1, 3, NA, 5, NA, 4, NA) # max value in the vector max(vec)

Output:

<NA>

You can see that we get `NA`

as the output. This is because comparing a value with NA results in an `NA`

in R.

### Maximum in a vector with `NA`

values

You can pass `TRUE`

to the `na.rm`

parameter of the `max()`

function to exclude missing values when computing the maximum value in a vector.

# create a vector with NA values vec <- c(1, 3, NA, 5, NA, 4, NA, NA) # max value in the vector max(vec, na.rm=TRUE)

Output:

5

Now we get the maximum value in the above vector as 5.

### Maximum value in a character vector

The `max()`

function also works similarly on a vector of characters. For example, let’s see what we get on applying the `max()`

function on a vector of characters.

# create a vector of chracters vec <- c("a", "b", "c", "d") # max value in the vector max(vec)

Output:

'd'

Here, we get ‘d’ as the maximum value in the above vector which contains the values ‘a’, ‘b’, ‘c’, and ‘d’.

You might also be interested in –

- Average of Values in an R Vector
- R – Sum of values in a Vector
- Create a Vector in R – With Examples
- How to Print a Vector in R?

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