# Calculate Arithmetic mean in R Programming – mean() Function

• Difficulty Level : Basic
• Last Updated : 05 Jun, 2020

`mean()` function in R Language is used to calculate the arithmetic mean of the elements of the numeric vector passed to it as argument.

Syntax: mean(x, na.rm)

Parameters:
x: Numeric Vector
na.rm: Boolean value to ignore NA value

Example 1:

 `# R program to calculate``# Arithmetic mean of a vector`` ` `# Creating a numeric vector``x1 <``-` `c(``1``, ``2``, ``3``, ``4``, ``5``, ``6``)``x2 <``-``c(``1.2``, ``2.3``, ``3.4``, ``4.5``)``x3 <``-` `c(``-``1``, ``-``2``, ``-``3``, ``-``4``, ``-``5``, ``-``6``)`` ` `# Calling mean() function``mean(x1)``mean(x2)``mean(x3)`

Output:

```[1] 3.5
[1] 2.85
[1] -3.5
```

Example 2:

 `# R program to calculate``# Arithmetic mean of a vector`` ` `# Creating a numeric vector``x1 <``-` `c(``1``, ``2``, ``3``, NA, ``5``, NA, NA)`` ` `# Calling mean() function``# including NA values``mean(x1, na.rm ``=` `FALSE)`` ` `# Calling mean() function``# excluding NA values``mean(x1, na.rm ``=` `TRUE)`

Output:

```[1] NA
[1] 2.75
```

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