How to generate an event in matlab every second

https://www.mathworks.com/help/matlab/ref/timer-class.html

https://www.mathworks.com/help/matlab/matlab_prog/use-a-matlab-timer-object.html

https://www.mathworks.com/help/matlab/matlab_prog/timer-callback-functions.html

You can setup up a timer class object to repeat a task at a fixed time rate. The simple way to create a timer object is

t = timer('ExecutionMode', 'fixedRate', 'Period', 1, 'TimerFcn', @(~,~) disp('1s passed'));

If you are using recent versions of MATLAB you can also use dot notation to specify timer properties

t = timer()
t. ExecutionMode = 'fixedRate'
t.Period = 1;
t.TimerFcn = @(~,~) disp('1s passed'); % you can use function handle or an anonymous function.

The TimerFcn is a callback function executed after each period of time. It must accept two or more inputs. First two inputs are used for accessing timer object handle and Event type. For most simple purposes first two inputs can be ignored. If you want to pass an additional input to TimerFcn you can use following notation

str = 'passed';
t.TimerFcn = {@(~,~,x) disp(['1s ' x]), str};

In this case, the timer Callback function will access the variable named str from base workspace. A more advanced example of timer callback function is

t.TimerFcn = {@(tObj,~,x) disp([num2str(tObj.Period) 's ' x]), str};

Here the callback function can also use the timer object handle and access its property using dot notation.