isfile - Determine if input is file - MATLAB (original) (raw)

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Determine if input is file

Syntax

Description

result = isfile([filename](#d126e923392)) returns 1 iffilename is a file located on the specified path or in the current folder. Otherwise, isfile returns 0.

Examples

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Check if the input myfile1.txt is a file. A result of 1 indicates that myfile1.txt is a file.

result = isfile('myfile1.txt')

Create the folder myfolder, then check if myfolder is a file. A result of 0 indicates that myfolder is not a file.

mkdir myfolder; result = isfile('myfolder')

Check if the inputs myfile1.txt and myfolder are files. A result of [1 0] indicates that myfile1.txt is a file and myfolder is not a file.

result = isfile(["myfile1.txt", "myfolder"])

result = 1×2 logical array 1 0

Input Arguments

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Filename, specified as a string array, character vector, or cell array of character vectors. For a local file, filename can include a relative path, but the relative path must be in the current folder. Otherwise, filename must include a full path.

For files and folders at a remote location, you must specify the full path as a uniform resource locator (URL). Internet URLs must include the protocol type "http://" or "https://". For more information, see Work with Remote Data.

Limitations

• MATLAB® does not support internet URLs that require authentication.
• MATLAB Online™ supports internet URLs associated with Microsoft® OneDrive™ files and folders, while the installed version of MATLAB supports only local OneDrive files.

Extended Capabilities

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Usage notes and limitations:

• Use of file: in the specified path is not supported.
• No preprocessing is applied on the specified path.
• In certain cases, the behavior of the generated code might differ from MATLAB. In such cases, the behavior of the generatedC code matches that of stat on UNIX® and GetFileAttributesA on Windows®.

Version History

Introduced in R2017b

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You can read data from primary online sources by performing file read operations over an internet URL.