Matlab is not recognizing sections %%

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Taylor Nichols
Taylor Nichols on 24 Jan 2019
Commented: per isakson on 7 Jan 2022
I am working with Matlab 2018a and for some reason Matlab stop recognizing my sections (%%). Maybe I did something after messing in Home>Preferences, but I'm not really sure. Has anyone had this problem before? I've look online and people say "Enable Cell Mode", but I have no idea how to do this in 2018a.
thanks in advance.
  1 Comment
Reza Banaei
Reza Banaei on 6 Jan 2022
Look for open sentences in your code. Something like
'output' ...
will break the sectioning.

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Answers (3)

Steven Lord
Steven Lord on 18 Jun 2019
Look for the message indicator in your file in the Editor. See the first picture on this documentation page for the location of the message indicator. Is it red? If so your code has a syntax error that would prevent it from running successfully, and if your code is not syntactically valid I believe MATLAB will not recognize your sections. Correct the problems that Code Analyzer has identified as red (error) issues and I expect the sections should resune working.
  2 Comments
Blake Porter
Blake Porter on 18 Jun 2019
Hi Steven, I do not have any errors in the code and it all executes. I gave a more detailed description here: https://www.mathworks.com/matlabcentral/answers/467586-matlab-2018a-editor-no-longer-showing-code-sections
Federico Sansalone
Federico Sansalone on 22 Dec 2021
I solved it simply changing the name of the script file wich was containing spaces! (From "Capacity Problem.m" to "CapacityProblem.m").

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Arvind Sathyanarayanan
Arvind Sathyanarayanan on 24 Jan 2019
Did you turn-off the sections in the Autoformatting menu? MA.png
  2 Comments
Blake Porter
Blake Porter on 18 Jun 2019
I have the same issue and I have both section break options ticked. Restarted Matlab and computer did not help.

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KIDKAWHI
KIDKAWHI on 17 Nov 2021
welp we all stuck in this boat
  3 Comments
per isakson
per isakson on 23 Dec 2021
Edited: per isakson on 23 Dec 2021
Spaces in mfile names are not allowed. The "message indicator" of R2018b indicates the error. It's red!
However, in my simple case R2018b still recognizes the sections.

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