# setdiff

Set difference of two arrays

## Syntax

## Description

returns
the data in `C`

= setdiff(`A,B`

)`A`

that is not in `B`

, with no repetitions.
`C`

is in sorted order.

If

`A`

and`B`

are tables or timetables, then`setdiff`

returns the rows from`A`

that are not in`B`

. For timetables,`setdiff`

takes row times into account to determine equality, and sorts the output timetable`C`

by row times.

and
`C`

= setdiff(`A,B`

,___,'rows')

treat each row of `C`

= setdiff(`A,B`

,'rows',___)`A`

and each row of `B`

as single entities
and return the rows from `A`

that are not in `B`

, with no
repetitions. You must specify `A`

and `B`

and optionally can
specify `setOrder`

.

The `'rows'`

option does not support cell arrays, unless one of the
inputs is either a categorical array or a datetime array.

## Examples

## Input Arguments

## Output Arguments

## Tips

To find the set difference with respect to a subset of variables from a table or timetable, you can use column subscripting. For example, you can use

`setdiff(A(:,`

, where),B(:,`vars`

))`vars`

is a positive integer, a vector of positive integers, a variable name, a cell array of variable names, or a logical vector. Alternatively, you can use`vars`

`vartype`

to create a subscript that selects variables of a specified type.

## Extended Capabilities

## Version History

**Introduced before R2006a**