isspace

Determine which characters are space characters

Syntax

TF = isspace(A)

Description

TF = isspace(A) returns a logical array TF. If A is a character array or string scalar, then the elements of TF are logical 1 (true) where corresponding characters in A are space characters, and logical 0 (false) elsewhere. isspace recognizes all Unicode^® whitespace characters.

If A is not a character array or string scalar, then isspace returns logical 0 (false). If A is a non-scalar string isspace throws an error.

Examples

Determine Which Character Array Elements Are Spaces

Create a character array, and then determine which elements are space characters.

chr = '123 Main St.'

chr = 
'123 Main St.'

TF = isspace(chr)

TF = 1x12 logical array

   0   0   0   1   0   0   0   0   1   0   0   0

Input Arguments

A — Input array

scalar | vector | matrix | multidimensional array

Input array, specified as a scalar, vector, matrix, or multidimensional array. A can be any data type.

If A is a non-scalar string isspace throws an error.

Tips

• To find space characters within elements of a nonscalar string array, use the isstrprop function.

• To find all characters for which isspace returns logical 1, use the code below. Then look up the returned decimal codes in a Unicode reference, such as the List of Unicode characters.

  find(isspace(char(1):char(intmax('uint16'))))

Extended Capabilities

C/C++ Code Generation

Generate C and C++ code using MATLAB® Coder™.

Usage notes and limitations:

• Input values from the char class must be in the range 0–127.

Thread-Based Environment
Run code in the background using MATLAB® backgroundPool or accelerate code with Parallel Computing Toolbox™ ThreadPool.

Version History

Introduced before R2006a