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I'm running a long simulation in MATLAB that I've realized I need to stop and rerun. However, MATLAB is really into this calculation, and it's stopped responding. How can I interrupt this run without killing MATLAB?
(I realize this is a problem with many Windows programs, but it's really acute with MATLAB.)
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To stop execution of a MATLAB® command, press Ctrl+C or Ctrl+Break. On Apple Macintosh platforms, you also can use Command+.
Typing pause(inf) puts you into an infinite loop. To return to the MATLAB prompt, type Ctrl+C. Example: pause(3) pauses for 3 seconds. Example: pause(5/1000) pauses for 5 milliseconds.
When MATLAB opens with "Initializing" or "Busy" for an extended period of time, the MATLAB installation may be experiencing a licensing issue.
Go to the command window, and hit Ctrl-C a lot. From my experience, on a single-core machine you do not have a chance, unless you do lots of output. On a multi-core or multi-processor machine, you'll probably stop it eventually, but it takes time.
See also http://www.mathworks.com/support/solutions/en/data/1-188VX/index.html
Added: it is a good practice to (1) save a snapshot of your workspace before running anything really long and (2) within a very long calculation, write some of the variables to a file from time to time, so that you can resume the calculation if it was interrupted (by power failure, e.g.).
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