Accessing shell environment variables in MATLAB under Ubuntu Linux 10.04

Question

Estevan 2011-7-29

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回答： Ty Watkins 2022-1-21

I am running MATLAB R2011a under Ubuntu 10.04. When I launch matlab by typing matlab& in a terminal window, I can access shell environment variables that have been set in /etc/profile.

However, when I launch MATLAB from the menu or from an icon (in either case, the .desktop command is "matlab -desktop"), these shell variables are not set.

How can I launch MATLAB from menus or icons and have it see the environment variables?

Thanks.

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Answer 1

Ty Watkins 2022-1-21

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Ran in to this same issue when I tried to create a menu launch for Matlab on RHEL7 running KDE Plasma. The issue is that if not run from a terminal, it will launch with a non-interative, non-login environment. Instead of going in and trying to move the additoins to the $PATH variable in the .bashrc above the logic that kicks a non-interative bash session out, a simple way is to start a new bash environment similar to what @Walter Roberson posed as his solution. However, I would recommend starting it as an interactive shell and not a login shell. There's not going to be a large difference between the two. The part that was missing is the you have to add the '-c' flag before the string containing the command you want to run. Change the command to the following and you should be good to go.

$SHELL -i -c 'matlab -desktop'

This should load all the environment variables that get set for a normal interactive terminal.

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Answer 2

Walter Roberson 2011-7-29

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Change the menu or icon so that the command for it is

$SHELL -l "matlab -desktop"

where you should probably replace $SHELL with the name of your preferred shell.

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Answer 3

Estevan 2011-8-1

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Thanks for your suggestion, but it doesn't work for me. Matlab doesn't launch at all after that change (and I tried various things, e.g. /bin/bash, with/without -l, -desktop, etc.)

Any other ideas?

Thanks!

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Answer 4

Igor Izyurov 2021-8-16

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10 years later another Matlab-on-Linux user [me] was having the same question.

I'm writing the answer for the history. The solution for any application is described here: https://askubuntu.com/questions/542152/desktop-file-with-bashrc-environment

In short, ~/.bashrc should be modified so, that all nessessary exporting occurs before these lines:

# Matlab, being run from Launcher won't see this:
export MATLABROOT=/usr/local/MATLAB/R2021a
# If not running interactively, don't do anything
case $- in
    *i*) ;;
      *) return;;
esac
# But will see this:
export MATLABROOT=/usr/local/MATLAB/R2021a