mustBeFolder

Validate that input path refers to folder

Since R2020b

Syntax

mustBeFolder(path)

Description

mustBeFolder(path) throws an error if path does not refer to a folder. This function does not return a value.

mustBeFolder calls the following function to determine if the input refers to a folder

• isfolder

Class support: All MATLAB^® classes

Examples

Run in Folder

Use the mustBeFolder function to ensure that a folder path passed to a function is a valid folder and avoid using conditional statements to test for a valid folder in the function body.

The runInFolder function ensures that the specified folder is valid before changing to that folder to run a function.

function r = runInFolder(path)
    arguments
        path {mustBeFolder}
    end
    orgFolder = cd(path);
    r = myFunct;
    cd(orgFolder)
end

Passing an invalid folder name as the input results in an error.

r = runInFolder("myFunct.m");

Error using runInFolder
 r = runInFolder("myFunct.m");
                 ↑
Invalid argument at position 1. The following folders do not exist: 'myFunct.m'.

Input Arguments

path — Path to folder

string scalar | character vector

Path to a folder or folders, specified as a string scalar, character vector, string array, or cell array of character vectors.

Example: "H:\myfolder\mysubfolder"

Data Types: char | string

Tips

• mustBeFolder is designed to be used for property and function argument validation.

Extended Capabilities

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

Version History

Introduced in R2020b