I want to use two MATLAB sessions on the same machine to run two different programs. My problem is that at some stage, the first program must use some results of the second program. So, is there a function that may apply to the first program to expect a step up the appearance of a result.
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54answers:
2
A:
there may be some toolboxes available for this. one solution for simple inter-process communication is to use semaphore files. (process #2 waits for process #1 to write a given file)
second
2010-09-06 15:46:43
+1
A:
The easiest way to solve this is to have process #1 create a file in a place accessible by both process #1 and process #2. Process #1 runs until it gets to the point where it needs the results from process #2. At this point, it goes into a loop while exist(myFileName),pause(1),end, which makes it wait as long as the file exists, checking every second for whether the file's gone. Process #2 removes the file as soon as it's done writing out the results, at which point process #1 continues.
Jonas
2010-09-06 15:46:56
perhaps you should put a `pause(..)` in that loop :)
Amro
2010-09-06 19:02:18
@Amro: Yes, I guess I should. Thanks!
Jonas
2010-09-06 19:22:43
if I have in process # 1: runmyfile1.m; runmyfile2.m; and in process # 2: runmyfile3.m; runmyfile4.m; I want the execution of runmyfile4.m occurs after the onset of the outcome of runmyfile1.m noted runmyfile1.mat
2010-09-07 22:00:01
@bzak: In this case, `runmyfile1.m` should write a file `wait.plz` right when it's launched. The file `wait.plz` is deleted by `runmyfile1.m` as soon as the output `runmyfile1.mat` has been written. The `while`-loop in my answer would be executed as the first line of `runmyfile4.m`.
Jonas
2010-09-07 22:21:51