any

---
description: Guidelines for any
globs: **/*
---


 Usage

Reduces a logical array along a given dimension by testing
for any logical 1s. The general syntax for its use is

    y = any(x,d)

where x is an n-dimensions array of logical type. The output
is of logical type. The argument d is optional, and denotes
the dimension along which to operate. The output y is the
same size as x, except that it is singular along the
operated direction. So, for example, if x is a 3 x 3 x 4
array, and we any operation along dimension d=2, then the
output is of size 3 x 1 x 4.


 Internals

The output is computed via
 \[ y(m_1,\ldots,m_{d-1},1,m_{d+1},\ldots,m_{p}) = \max_{k}
x(m_1,\ldots,m_{d-1},k,m_{d+1},\ldots,m_{p}) \]
If d is omitted, then the summation is taken along the first
non-singleton dimension of x.


 Example

The following piece of code demonstrates various uses of the
summation function

  --> A = [1,0,0;1,0,0;0,0,1]

  A =
   1 0 0
   1 0 0
   0 0 1

We start by calling any without a dimension argument, in
which case it defaults to the first nonsingular dimension
(in this case, along the columns or d = 1).

  --> any(A)

  ans =
   1 0 1

Next, we apply the any operation along the rows.

  --> any(A,2)

  ans =
   1
   1
   1


* FreeMat_Documentation
* Elementary_Functions
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