Programming Utilities

Evaluate expressions or functions indirectly, set timers, handle exceptions

MATLAB^® includes functionality to indirectly evaluate expressions, set timers for program execution, and capture data on errors.

Functions

`eval`	Evaluate MATLAB expression
`evalc`	Evaluate MATLAB expression and capture results
`evalin`	Evaluate MATLAB expression in specified workspace
`feval`	Evaluate function
`run`	Run MATLAB script
`builtin`	Execute built-in function from overloaded method

`timer`	Schedule execution of MATLAB commands
`delete`	Delete files or objects
`get`	Query graphics object properties
`isvalid`	Determine valid handles
`set`	Set graphics object properties
`start`	Start timer
`startat`	Schedule timer to fire at specified time
`stop`	Stop timer
`timerfind`	Find timer objects
`timerfindall`	Find all timer objects
`wait`	Block command prompt until timer stops running

`try, catch`	Execute statements and catch resulting errors
`MException`	Capture error information
`addCause`	Record additional causes of exception
`addCorrection`	Provide suggested fix for exception (Since R2019a)
`getReport`	Get error message for exception
`MException.last`	Return last uncaught exception
`rethrow`	Rethrow previously caught exception
`throw`	Throw exception
`throwAsCaller`	Throw exception as if occurs within calling function
`matlab.lang.correction.AppendArgumentsCorrection`	Correct error by appending missing input arguments (Since R2019a)
`matlab.lang.correction.ConvertToFunctionNotationCorrection`	Correct error by converting to function notation (Since R2019b)
`matlab.lang.correction.ReplaceIdentifierCorrection`	Correct error by replacing identifier in function call (Since R2019b)

`parfevalOnAll`	Run function on all workers in background
`parallel.pool.Constant`	Copy or create data only once on workers in parallel pool (Since R2021b)
`canUseGPU`	Verify supported GPU is available for computation (Since R2019b)
`canUseParallelPool`	Verify that parallel functions can use a parallel pool (Since R2020b)

Schedule Command Execution Using Timer

To schedule the execution of MATLAB commands, create a timer object.
- Timer Callback Functions
- Handling Timer Queuing Conflicts
Exception Handling in a MATLAB Application

It is a good programming practice to include error checking in your programs to ensure reliable operation under all conditions. You can decide how your programs respond to different types of errors.
- Throw an Exception
- Respond to an Exception
Create Hyperlinks that Run Functions
Functions that support the matlab: keyword can display hyperlinks, which execute commands when you click the hyperlink text.
Alternatives to the eval Function
Although the eval function is very powerful and flexible, it is not always the best solution to a programming problem. In many instances, there are recommended alternative approaches to using eval.
Run Parallel Language in MATLAB
You can run parallel code in serial if you do not have Parallel Computing Toolbox™.