Running a matlab code through bash script

I've a matlab code that needs to be run for different set of "independent" inputs. I want to run the matlab code through unix bash script, and then run the script in multiple computers parallelly to get the speed-up.

I am fairly new to this. Does any of you have any idea on how to go about it?

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Answer 1

[Walter Roberson]

You need to find your MATLAB command line executable. For Mac it would be /Applications/MATLAB_R2020a.app/bin/matlab . You would invoke it with -nojvm and -nodesktop . With sufficiently new MATLAB releases you might instead prefer to use -batch

/Applications/MATLAB_R2020a.app/bin/matlab -nojvm -nodesktop  %older
/Applications/MATLAB_R2020a.app/bin/matlab -batch

You would then follow that on the command line with a -r option and then the quoted command to execute. It is safest to put the command within try/catch if you are not using the -batch command: For example,

/Applications/MATLAB_R2020a.app/bin/matlab -nojvm -nodesktop -r "try; cd('/Appropriate/Place'); AppriopriateFunction(WithParameters);catch; end; quit"

See also https://www.mathworks.com/help/matlab/ref/matlablinux.html

[YOGENDRA SINGH BHANDARI]

One another doubt I had is does the matlab executable query the license server? I wanted to run the jobs in batch, but not query the license server due to limitations. Hence the executable approach.

[Walter Roberson]

Yes, the executable referred to above is a complete interactive MATLAB, just with the desktop turned off. It does want licenses including possibly talking to license servers.

In order to not query the license server, you would need MATLAB Compiler or MATLAB Coder to generate a compiled executable. The compiled executable would have to be pre-programmed to run a particular function entry point and only pre-compiled scripts and functions could be used. The executables can however, accept command line arguments, including possibly naming a data file to process.

[YOGENDRA SINGH BHANDARI]

As an extension to your second argument, can I generate the compiled executable using -mcc command? Upon doing mcc -m mycode.m -o mycode, two files(one executable, another .sh file) get generated. Will that work?

[Walter Roberson]

I do not know if .sh will get generated, but an executable would be generated . The executable would not need license checks.