MATLAB Function Reference
any

Test for any nonzeros

Syntax

• ```B = any(A)
B = any(A,`dim`)
```

Description

```B = any(A) ``` tests whether any of the elements along various dimensions of an array are nonzero or logical true (`1`).

If `A` is a vector, `any(A)` returns logical true (`1`) if any of the elements of `A` are nonzero, and returns logical false (`0`) if all the elements are zero.

If `A` is a matrix, `any(A)` treats the columns of `A` as vectors, returning a row vector of `1`s and `0`s.

If `A` is a multidimensional array, `any(A)` treats the values along the first non-singleton dimension as vectors, returning a logical condition for each vector.

```B = any(A,dim) ``` tests along the dimension of `A` specified by scalar `dim`.

Examples

Given,

• ````A = [0.53 0.67 0.01 0.38 0.07 0.42 0.69]`
```

then `B = (A < 0.5)` returns logical true (`1`) only where `A` is less than one half:

• ```0   0   1   1   1   1   0
```

The `any` function reduces such a vector of logical conditions to a single condition. In this case, any(B) yields `1`.

This makes `any` particularly useful in `if` statements,

• ```if any(A < 0.5)
```do something
```end
```

where code is executed depending on a single condition, not a vector of possibly conflicting conditions.

Applying the `any` function twice to a matrix, as in `any(any(A))`, always reduces it to a scalar condition.

• ```any(any(eye(3)))
ans =
1
```

`all`, logical operators, relational operators, `colon`
`max`, `mean`, `median`, `min`, `prod`, `std`, `sum`, `trapz`