MATLAB: GUI push button with delay

gui push button dealy

I have two files where first button should run in first click and after delay the second file should run . Any comments or command to delay a second file to run.

Best Answer

You can create a timer object to delay the execution of a function. Here is an example:

SecondFunction = @() disp([' ... ' num2str(toc) ' seconds have elapsed ...']) ;
TimerHandle = timer('StartDelay',2,'TimerFcn','SecondFunction()') ;
tic ;
start(TimerHandle)
disp('Hello, I am going to be busy for about four seconds ...')
pause(4) % ... busy ...
disp(['Now it is ' num2str(toc) ' seconds later, so ... Goodbye!'])

Related Solutions

MATLAB: Varying timer’s period inside the TimerFcn

This page mentions an approach to vary the period of timer: https://stackoverflow.com/questions/15576682/matlab-change-repeating-timer-period

Here I show the method mentioned in the second answer. This example sets a random time period between 1 to 5 seconds after each callback of timer.

t = timer('StartDelay', 1, 'TimerFcn', @timerFcn, ...
    'StopFcn', @timerStopFcn, 'ExecutionMode', 'singleShot');
start(t);
function timerFcn(obj, ~)
    disp(obj.StartDelay)
end
function timerStopFcn(obj, ~)
    period = randi([1 5]);
    obj.StartDelay = period;
    start(obj);
end

MATLAB: Running a Timer at a specific time

AA - first we need to find the current time (in seconds) which we can do with the now function as

 currentTimeSecs = rem(now,1)*24*60*60;

We multiply the remainder by 24 (hours) by 60 (minutes) and by 60 (seconds) to get the appropriate units (of seconds) for the current time. Now, we need to determine "where" this time is relative to 15:00:00 (the time at which we want to fire the timer). We can convert this to seconds as

 fireTimerAtSecs = 15*60*60;

multiplying the number of hours (15) by 3600 to convert to seconds. The delay that you wish to add to the timer (so that it will fire at 15:00:00) is then

 if currentTimeSecs < fireTimerAtSecs
     % timer will fire today
     timerDelaySecs = fireTimerAtSecs - currentTimeSecs;
 else
     % timer will fire tomorrow
     timerDelaySecs = (24*60*60 - currentTimeSecs) + fireTimerAtSecs;
 end

In the above, we need to account for whether the timer will fire later today or tomorrow depending upon the current time.

You can now use this delay as the StartDelay in your timer as

 T = timer('Period',120,                 ...
           'ExecutionMode','fixedRate',  ... 
           'StartDelay', timerDelaySecs, ...
           'TimerFcn',@(src,evt)disp('hi'));
 start(T);

The above should invoke the timer after the expected delay, printing the message hi every 120 seconds thereafter.

Best Answer

Related Solutions

MATLAB: Varying timer’s period inside the TimerFcn

MATLAB: Running a Timer at a specific time

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