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isempty

Determine whether array is empty

Syntax

TF = isempty(A)

Description

TF = isempty(A) returns logical 1 (true) if A is an empty array and logical 0 (false) otherwise. An empty array has at least one dimension of size zero, for example, 0-by-0 or 0-by-5.

Examples

collapse all

Determine if a multidimensional array is empty or not.

A = rand(2,2,2);
isempty(A)
ans = logical
   0

A(:,:,:) = [];
isempty(A)
ans = logical
   1

Tips

  • To determine whether a string array has empty strings (string elements with zero characters), use the == operator. For example, if str is a string containing zero characters, then str == "" returns logical 1 (true). For more information on testing empty strings, see Test for Empty Strings and Missing Values. For information on string comparison, see Compare Text.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

See Also

Introduced before R2006a