can i pause matlab excution while it is already running

hi every on ,

can i pause matlab excution while it is already running

(i.e) if i have a script and is already running can i pause it for any time then resuming it again .

thanks a lot .

[LJ]

You can use this clever function the next time. It will allow you to pause the execution any time you want just with the click of a button and then you can resume it pressing F5.

http://www.mathworks.com/matlabcentral/fileexchange/35114-pause-a-long-matlab-run-with-a-simple-click

[Walter Roberson]

That will not work unless there is a figure() or drawnow() or pause() or waitfor() or uiwait() somewhere in the code. Pushbuttons are not serviced until the graphics queue is processed, which requires one of the above to happen.

Answer 1

[Nick Hilton]

If you're on a UNIX platform, then there is an easy way to do this:

Simply run your script on the command line in a BASH shell like so:

matlab -nodesktop -nosplash -r "run_some_script(arg1, arg2, ...)"

Now that it is running, you can pause execution by pressing CTRL+Z, which pauses execution and returns you to the BASH prompt again. To continue execution, execute the 'fg' command to put the suspended job back into the foreground.

Another advantage to this approach, most graphical terminals provide an output buffer, and one can scroll and examine the output buffer without pausing the execution, and without new output causing the buffer to scroll the screen. So I can look at the buffer to tell where the execution is in a loop, for example, without pausing anything.

I hope this helps someone that finds this topic.

[Chuck]

Very clever, thank you! I'm assuming there is not a way to do this on a Windows machine?

[Benoit Espinola]

This is gold!

"Another advantage to this approach, most graphical terminals provide an output buffer, and one can scroll and examine the output buffer without pausing the execution, and without new output causing the buffer to scroll the screen. So I can look at the buffer to tell where the execution is in a loop, for example, without pausing anything."

And how can we consult this output buffer?

Would you say that consulting the output buffer could give me information on the state of the execution of the code?

Many thanks,

Benoit

[Walter Roberson]

To consult the output buffer, use the Page Up / Page Down keys, or use whatever scrollbar your terminal application provides. Here, "output buffer" refers a configurable number of lines of stdout .

For example on OS-X, inside the Terminal.app utility, Preferences -> Profiles -> Window permits me to configure whether I want scrollback to be limited to available memory, or to a specific number of output lines.

Answer 2

[Image Analyst]

With R2016a, there is now a Pause button on the tool ribbon that appears when your code runs:

Answer 3

[Mahdi]

You can pause the script/function that you're running for a specified amount of time without quitting the script.

You can use the pause(n) function to stop the script for n seconds.

If you're using a GUI, I would suggest looking at uiwait.

Answer 4

[Jan]

No.

[Jan]

Sorry, I did not want to pollute my answer by too many details: You can stop the execution by hitting Ctrl-C, but afterwards you cannot resume.

Actually, the results must be correct, if you force the computer to fall asleep, e.g. a hibernation. But I would test this exahsutively before I'd trust the results.

[Walter Roberson]

You might also be able to suspend MATLAB from the operating system.

Answer 5

[Omer Moussaffi]

Not without preparation. You could add the command 'keyboard' into the script at a specified place, and then it would give you back control. You then do your changes, and either call 'return' to resume or dbquit to stop the script.

check out: http://www.mathworks.com/help/matlab/debugging-code.html

Answer 6

[jingxuan yang]

use

uiwait

to pause

and use

uiresume

to continue

[Walter Roberson]

Yes, if you have the cooperation of the code being run, if it knows that you should pause there, or if it regularly calls one of the functions such as drawnow() that processes the event queue to permit a callback to be triggered to run the uiwait()