## Name

iqr — interquartile range

## Calling Sequence

q=iqr(x)
q=iqr(x,'r') (or, equivalently, q=iqr(x,1))
q=iqr(x,'c') (or, equivalently, q=iqr(x,2))

## Parameters

- x
real or complex vector or matrix

## Description

This function computes the interquartile range IQR= upper
quartile - lower quartile of a vector or a matrix ` x `

.

For a vector or a matrix ` x`

, ` q=iqr(x)`

returns in the scalar ` q`

the interquartile range of
all the entries of ` x`

.

` q=iqr(x,'r') `

(or, equivalently,
`q=iqr(x,1)`

) is the rowwise interquartile range. It returns in
each entry of the row vector ` q`

the interquartile
range of each column of ` x`

.

` q=iqr(x,'c') `

(or, equivalently,
`q=iqr(x,2)`

) is the columnwise interquartile range. It returns in
each entry of the column vector ` q`

the
interquartile range of each row of ` x`

.

## Bibliography

Wonacott, T.H.Wonacott, R.J.; Introductory Statistics, J.Wiley-Sons, 1990.