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Elementary functions

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find

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Find Non-zero Elements

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Syntax

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K = find(M)

[R, C] = find(M)

[R, C, V] = find(M)

K = find(M, N)

[R, C] = find(M, N)

[R, C, V] = find(M, N)

K = find(M, N, D)

[R, C] = find(M, N, D)

[R, C, V] = find(M, N, D)

Input argument

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M

a scalar, vector, matrix, or multidimensional array.

N

positive integer scalar value: number of nonzeros to find.

D

direction: 'first' (default) or 'last'.

Output argument

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K

indices to nonzero elements (vector).

R

row subscripts (vector).

C

column subscripts (vector).

V

nonzero elements of M (vector).

Description

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K = find(M) returns a vector with the linear indices of each nonzero element of M.

Example

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M = rand(4, 3, 5);
[R, C, V] = find(M > 0.9)
M(R(1),C(1),V(1))

See also

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strfind.

History

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Version	Description
1.0.0	initial version

Author

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Allan CORNET