MATLAB Programming Fundamentals - MathWorks

If this function receives invalid arguments, MATLAB throws an error message and stops

the program:

combinations(6,9)

Error using combinations (line 3)

Cannot choose 9 from 6 elements

Add Identifiers to Warnings and Errors

A message identifier provides a way to uniquely reference a warning or an error.

Enable or disable warnings with identifiers. Use an identifying text argument with the

warning function to attach a unique tag to a message:

warning(identifier_text,message_text)

For example, you can add an identifier tag to the previous MATLAB warning about which

version of software is running:

minver = '7';

if ~strncmp(version,minver,1)

warning('MYTEST:VERCHK','Running a version other than v%s',minver)

end

Adding an identifier to an error message allows for negative testing. However, adding and

recovering more information from errors often requires working with MException

objects.

See Also

MException | lastwarn | warndlg | warning

Related Examples

• “Suppress Warnings” on page 26-34


• “Restore Warnings” on page 26-37


• “Capture Information About Exceptions” on page 26-5


• “Exception Handling in a MATLAB Application” on page 26-2

26 Error Handling