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How to tell if a function was called from within Matlab or from system?

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Chris Angeloni
Chris Angeloni on 17 Feb 2021
Commented: Walter Roberson on 20 Feb 2021
I've been running Matlab code on a high performance cluster, but while debugging it is useful to run it in an interactive matlab instance for plotting and such. However, I would want my code to do different things when called from the cluster compared to when it's called interactively in the matlab GUI. My specific case is using bash to call my matlab function in a unix-based cluster.
Is there a way to programmatically determine from which environment a Matlab function was called from?

Answers (2)

John D'Errico
John D'Errico on 17 Feb 2021
Perhaps you might try what are essentially different calls, where you pass information about WHERE your call is coming from. So subtly different calls to the same function, but one of the arguments to that function is now an indicator variable that will change the behavior of the function.

Walter Roberson
Walter Roberson on 17 Feb 2021
isunix() will be true on the cluster, or on desktop Linux or Mac systems, but not on Windows systems.
If your desktop is Mac, then ismac() is true. Contrawise, isunix() && ~ismac() implies linux()
When isunix() is true,
HN = system('hostname')
would permit you to differentiate between different Linux hosts you run the code on.
  2 Comments
Walter Roberson
Walter Roberson on 20 Feb 2021
Set an environment variable in the bash script and in the matlab code check the environment variable with getenv()?

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