# R Mean, Median & Mode - r - learn r - r programming

- R uses many in-built functions to perform Statistical analysis in R is performed by using many in-built functions.
- Most of these functions are part of the R base package.
- These functions take R vector as an input along with the arguments and give the result.
- Here we discussing mean, median and mode.

## Mean

- It is calculated by taking the sum of the values and dividing with the number of values in a data series.
- The function mean() is used to calculate this in R.

## Syntax

- The basic syntax for calculating mean in R is

**x**is the input vector.**trim**is used to drop some observations from both end of the sorted vector.**na.rm**is used to remove the missing values from the input vector.

r programming median

## Example

- When we execute the above code, it produces the following result

## Applying Trim Option

- When trim parameter is supplied, the values in the vector get sorted and then the required numbers of observations are dropped from calculating the mean.
- When trim = 0.3, 3 values from each end will be dropped from the calculations to find mean.
- In this case the sorted vector is (−21, −5, 2, 3, 4.2, 7, 8, 12, 18, 54) and the values removed from the vector for calculating mean are (−21,−5,2) from left and (12,18,54) from right.

- When we execute the above code, it produces the following result

## Applying NA Option

- If there are missing values, then the mean function returns NA.
- To drop the missing values from the calculation use na.rm = TRUE. which means remove the NA values.

- When we execute the above code, it produces the following result

## Median

- The middle most value in a data series is called the median. The median()function is used in R to calculate this value.

## Syntax

- The basic syntax for calculating median in R is

**x**is the input vector.**na.rm**is used to remove the missing values from the input vector.

## Example

- When we execute the above code, it produces the following result

## Mode

- The mode is the value that has highest number of occurrences in a set of data.
- Unike mean and median, mode can have both numeric and character data.
- R does not have a standard in-built function to calculate mode. So we create a user function to calculate mode of a data set in R.
- This function takes the vector as input and gives the mode value as output.

## Example

- When we execute the above code, it produces the following result