# findnz

Version:

Returns the indexes of all non-zero elements in a matrix.

## Syntax

ind = findnz(a)
ind = findnz(a, n)
ind = findnz(a, n, direction)
[i, j] = findnz(a)
[i, j] = findnz(a, n)
[i, j] = findnz(a, n, direction)
[i, j, c] = findnz(a)
[i, j, c] = findnz(a, n)
[i, j, c] = findnz(a, n, direction)
Legacy name: find

## a

Vector or matrix of any data type.

## n

Number of matches to return. n is a positive integer. The default is to return all matches.

## direction

Direction to search for matches. direction is a string, that accepts the following values.

Name Description
'first' (default)

Returns the first n matches.

'last'

Returns the last n matches.

## ind

Linear indexes of all non-zero elements of a. a is considered a long vector a(:) if only one output is required. ind is a row vector if a is a row vector, otherwise ind is a column vector.

## i

First indexes of all non-zero elements of a. i is a column vector.

## j

Second indexes of all non-zero elements of a. j is a column vector.

## c

All non-zero elements of a. c is a column vector.

A = [1, 2, 3; 0, 0, 0; 0, 2, 3]
[I, J] = findnz(A)

Where This Node Can Run:

Desktop OS: Windows

FPGA: This product does not support FPGA devices