isstring

Determine if input is string array

Syntax

tf = isstring(A)

Description

tf = isstring(A) returns 1 (true) if A is a string array. Otherwise, it returns 0 (false).

Examples

Determine if Array Contains String Values

Create different arrays, and then determine if they are string arrays.

Test a character vector.

chr = 'Mary Jones'

chr = 
'Mary Jones'

tf = isstring(chr)

tf = logical
   0

Character vectors are not strings, so isstring returns 0.

Test a string array. Starting in R2017a, you can create strings using double quotes.

str = ["Smith","Chung","Morales"; ...
       "Sanchez","Peterson","Adams"]

str = 2x3 string
    "Smith"      "Chung"       "Morales"
    "Sanchez"    "Peterson"    "Adams"  

tf = isstring(str)

tf = logical
   1

str is a string array, so isstring returns 1.

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.

Extended Capabilities

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

Thread-Based Environment

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

This function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.

Distributed Arrays

Partition large arrays across the combined memory of your cluster using Parallel Computing Toolbox™.

This function fully supports distributed arrays. For more information, see Run MATLAB Functions with Distributed Arrays (Parallel Computing Toolbox).