section divider or %% is not working

I solved several small problems in sections using section divider %% Section. I ran each sections & every section worked. Today I opened the file, %% Sections are there, but section dividers are not working. How to correct the situation. Thanks Abu Sarwar

[Jan]

What does "section dividers are not working" exactly mean?

Answer 1

[Stephen23]

Cell mode can be enabled or disabled from the Cell menu.

Different versions of MATLAB might put this in different places, but on my ancient R2010b it is located on the main editor menu bar:

[Jiangdong Collignon]

In MATLAB R2018b, you go to tab HOME -> Preferences -> Editor/Debugger -> Autoformatting and then you tick the boxes in section break.

Personally, I had it on and the it still didn't work but I found out why : I put my function at the beginning of my script by accident so from that section, I couldn't split the script into sections with %%. Just put your function at the end of your script and it maybe it'll work for you too :)

Answer 2

[DGM]

It's also worth noting that having open scopes, imbalanced parentheses/brackets, or other gross errors can break the handling of section breaks. It's a bit moot, since invalid code won't run anyway, but that might be one reason your section highlighting suddenly stops working.

A = [1 2 3; % this is an error
%% oh no my cell divider doesn't work!
B = 12.34; % some other code

Answer 3

[the cyclist]

Are you referring to cell mode? If so, can you post the code that is not working as you expect?

Did you try simple things like saving and re-opening the file, or restarting MATLAB?

[Abu Sarwar]

I am a new user. Yesterday I tried to go cell mode, but I think I was not successful. I do not know how to go "cell mode". The problem happened after my attempts to go to cell mode. Following is an example of two sections:

%% if == test using simple example

a=input('Enter a = ')

b= input('Enter b = ')

if a==b c=2*a^2

elseif a>b deltaab=a-b

else deltaba=b-a

end

%% use of && ==

m=input('Enter m = ')

n= input('Enter n = ')

if m>4 && n>10 mg4ng10=m*n

elseif m==4 n==10 mnn=m*n^2

else mmn=m^2*n

end

Answer 4

[Image Analyst]

And how did you try to execute it? Did you use the green Run triangle or F5, OR did you try Step or F10? Which way? Using F5 will just blast through everything without stopping at cells whereas F10 will stop at cells.

Also make sure the Section Break checkboxes are checked in the Autoformatting preferences:

[Abu Sarwar]

I went to Editor & tried different ways, but not sure what I tried. I always run a section by placing mouse on a desired section & select "Evaluate Current Section". Thanks

[Abu Sarwar]

It is working. Thanks all

Answer 5

[Megan Yip]

For anyone eldr who had this problem, make sure that if you have text after the %%, that you have a space between the second % and the first text character. For example, use

%% Section Name

which will work, rather than

%%Section Name

which won't work.

Answer 6

[GANDI RAVIKUMAR]

May be below is the one of the reason..

Check your file name with which you have saved.

File name should not have any spaces, if it contains any spaces just rename it and remove spaces then it might work.

Check once.

Thank you...!!!!1