find

Find Non-zero Elements

Syntax

• 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

• 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

• K - indices to nonzero elements (vector).
• R - row subscripts (vector).
• C - column subscripts (vector).
• V - nonzero elements of M (vector).

Description

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

Example

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

See also

strfind.

History

Author

Allan CORNET