How to make new scheme persistent?

[rjrich]

I am new to Matlab and to matlab-schemer. I am running Matlab 2022b_r3 on Linux (Linux Mint 21.1 Xfce, based on Ubuntu 22.04 LTS). I have managed to use matlab-schemer to switch from the Matlab default color scheme to the cobalt scheme, but when I close Matlab and restart it, the color scheme has reverted to the Matlab default light color scheme. Is there a way to make the matlab-schemer cobalt scheme persistent so that Matlab starts up with the cobalt scheme?

[scottclowe]

That's unexpected, as the scheme is supposed to persist between closing and reopening MATLAB. It does the same thing as if you manually go in the preferences dialog and set the customizable GUI colours. If you manually set one of the colours in the preferences, does that persist between closing and reopening MATLAB?

[rjrich]

Thanks for your reply. I tried setting colors in the preferences and then Apply followed by OK. I then quit matlab and launched it again, but the colors had reverted to the matlab default light scheme.

On Mon, Feb 27, 2023 at 11:27 AM Scott Lowe @.***> wrote:

That's unexpected, as the scheme is supposed to persist between closing and reopening MATLAB. It does the same thing as if you manually go in the preferences dialog and set the customizable GUI colours. If you manually set one of the colours in the preferences, does that persist between closing and reopening MATLAB?

— Reply to this email directly, view it on GitHub https://github.com/scottclowe/matlab-schemer/issues/41#issuecomment-1446642609, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAP6T7ITHGPW3YA52FLPZ5LWZTIVHANCNFSM6AAAAAAVH7QMRI . You are receiving this because you authored the thread.Message ID: @.***>

[scottclowe]

Okay, in that case its not an issue with Schemer, it's an issue with your MATLAB installation.

I think it this issue can be caused by installing MATLAB as root and running it as a user without sudo privileges. My recommendations are:

• Launch matlab from the terminal and check to see if an error message is displayed.
• Run the command prefdir in MATLAB to see where your preferences directory is, and then in terminal use ls to check the permissions for that directory and the preferences file within it. You may want to set it so all users can read and write that directory chmod a+rw -R DIRNAME.
• Check existing MATLAB support tickets on this topic to see if they fix your issue, e.g. https://www.mathworks.com/matlabcentral/answers/1777865-matlab-preferences-not-being-saved-across-sessions
• Reinstall MATLAB

I will close this issue now, as it is not a problem with Schemer.

If you debug and find a solution to your problem, please post here so others will know a solution to try if they face the same problem and happen upon this post.

[rjrich]

• Launching matlab from the terminal did not display any errors.
• Changing file permissions on prefdir did not remedy the problem.
• However, the following fix did correct the problem: https://www.mathworks.com/matlabcentral/answers/1806255-why-aren-t-my-matlab-preferences-saved-on-linux Thanks!