I have this optimization problem that runs for hours. I was hoping it would be over but it's not. I'm at a lab pc and I wdon't want someone to switch off the simulation when I leave. Of course I could write a sign board. Wondering if there is any other way to tell matlab to save the output of the current running command to a file or switch diary on while another process is running?
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I'm using MATLAB and calling an .exe via the system command.
[status,cmdout] = system(command_s);
where command_s is a command string that is formatted earlier in my script to pass all the desired options to the .exe. The .exe would normally write to a .csv file via the > redirection operator in Windows/DOS. Instead, this output is going to cmdout where I use it later in the MATLAB script. It is working correctly and as expected. I'm doing it this way so that the process just uses memory and does not write a very large file to the disk, which would then have to be read from the disk and then deleted after I'm done with it. In the end, it saves a .mat file that's usually in hundreds of KB instead of 10s/100s of MBs as the .csv file would be (some unneeded data is thrown out in the end).
The issue I'm having is since I'm dealing with large files, the executable can take a significant amount of time. I typically have to wait about 2 minutes after executing this command. In the meantime, I have no feedback to know it is progressing and that my system hasn't froze. I know I could add the & symbol to the end of my string, command_s, and run MATLAB code while this is running in the background (or asynchronously as some would say), but that brings up an external window AND makes cmdout empty - so I cannot use the output - forcing me to sit there for 2 minutes wondering each time it executes.
Is there any way to run in the background AND get the stdout from the command?
Maybe you could try system(command_s,'-echo')?
I got a .exe file complied by Fortran, which is for converting one format to another one. I have to run it lots of times and each time with different input. I could able to run the exe file with below script
command=('C:\Program Files\Director2.exe < O:\Free\1.dat');
system(command);
until now every thing is fine but when the GUI is comes up plus input data, I should chose the format and new directory for saving the conversion. I would like to know, is there any way to do that? Indeed I don't wanna use java.awt.Robot class which is not work for me (GUI automation using a Robot).
Also I have check this post, which has not been helpful.
(How to run .exe file from matlab)
Thanks in advance,
I would like to update variable editor at a predefined interval during a running script without having to use a break. Is this possible? I have a sim that runs for hours, I would like to be able to come back every hour and grab some values off a matrix in variable editor to play with in excel without interrupting running script. Any ideas would be greatly appreciated.
I think using assignin to copy your matrix to the base workspace should do exactly what you want. You'd need to manually reopen the variable in the editor to reflect the new data if it's changed.
If you wanted to get fancier, I imagine you could script evalin and openvar to do it for you, but I no longer have real Matlab to test with and Octave's fledgling GUI isn't there yet.
I have a few Perl scripts on a Solaris SunOS system which basically connect to other nodes on the network and fetch/process command logs. They run correctly 99% of the time when run manually, but sometimes they get stuck. In this case, I simply interrupt it and run again.
Now, I intend to cron them, and I would like to know if there is a way to detect if the script got stuck in the middle of execution (for whatever reason), and preferably exit as soon as that happens, in order to release any system resources it may be occupying.
Any help much appreciated.
TMTOWTDI, but one possibility:
At the start of your script, write the process id to a temporary file.
At the end of the script, remove the temporary file.
In another script, see if there are any of these temporary files more than a few minutes/hours old.
Assume that you start running the script. What happens when you change that file when it is being executed? It seems that MATLAB takes a copy of the file and then starts executing it. I want to make sure that I am right. That said, I want to run a MATLAB script with different parameters on a clusters. Does it work correctly if I do the changes on that one file. Or do I need to create multiple copies of the file myself?
Changing the contents of a script / function while it is running will not affect the operation of the script as MATLAB is running a (generically speaking) "cached" and "preprocessed" version of the file. As for running a script with multiple parameters in a cluster, I assume you are using the Parallel Computing Toolbox?
One option might be to have the script load its parameters from a MAT file, allowing you to run the same script on all workers, but operate on different parameters.
Basically you will be fine if you only have one Matlab m-file for all of your computation.
But if if the file you edit get called multiple times during your computation then you will run the risk of calling multiple versions of the file by editing while running. See more in here: http://www.mathworks.com.au/matlabcentral/newsreader/view_thread/261376