MATLAB Programming Fundamentals - MathWorks

This example creates a function hello that requires one input argument. If the function

is called without inputs, MATLAB produces and error and suggests the input argument

"world" as a fix.

function hello(audience)

if nargin < 1

me = MException('MATLAB:notEnoughInputs','Not enough input arguments.');

aac = matlab.lang.correction.AppendArgumentsCorrection('"world"');

me = me.addCorrection(aac);

throw(me);

end

fprintf("Hello, %s!\n", audience);

end

When you call the function without an argument, MATLAB suggests a fix.

hello

Error using hello (line 6)

Not enough input arguments.

Did you mean:

>> hello("world")

Methods of the MException Class

There are several methods that you can use with the MException class. The names of

these methods are case-sensitive. See the MATLAB function reference pages for more

information.

Method Name Description

addCause Append an MException to the cause field of

another MException.

addCorrection Provide a suggested fix for the current

exception.

getReport Return a formatted message based on the

current exception.

MException.last Return the last uncaught exception. This is a

static function.

rethrow Reissue an exception that has previously been

caught.

throw Issue an exception.

26 Error Handling