# quartile

Calculate the 3 quartiles of the data x.

## Contents

## Syntax

q = quartile(x)

## Description

If x is a matrix, it is treated columnwise. nan values in x are ignored.

The difference between q(3) and q(1) is the interquartile distance. 0.74*interquartileDistance is an estimate of standard deviation.

## Example

quartile([0 10 20 30 40]) ans = 10 20 30

## See Also

quantile