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can I disable entire sections of code temporarily

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Tom
Tom on 28 Mar 2012
Commented: Miguel Ordoñez on 31 Mar 2018
Can I disable entire sections of code temporarily?
I have a large code that contains different scenarios. I'm working on one scenario and I'd like to disable the other sections, just while I'm working on that bit so that I can run the code quickly without having to wait for it to do all the other stuff too.

  3 Comments

Matt Fig
Matt Fig on 2 Nov 2012
Tom's question
Can I disable entire sections of code temporarily?
I have a large code that contains different scenarios. I'm working on one scenario and I'd like to disable the other sections, just while I'm working on that bit so that I can run the code quickly without having to wait for it to do all the other stuff too.
Giovanni Guerrero
Giovanni Guerrero on 5 May 2016
comment out the lines using (hold) ctrl then R then undo this by (hold) ctrl then T
Kabilan Nedunchezian
Kabilan Nedunchezian on 2 Feb 2017
Hi,
Use commenting in a smart way!
the following will not be executed in your code
%{
x = ('this will not be executed')
%}
to make it executable just remove the first curly bracket to make it executable
%
x = ('this will be executed')
%}

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Accepted Answer

kfir
kfir on 28 Mar 2012
You can mark this whole part and Ctrl+R. you can also work in cell mode, and run only the cells you want.

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Tom
Tom on 28 Mar 2012
Sorry, but I didn't understand that answer. I tried selecting an area of the code and pressing Ctrl+R and nothing happened. I haven't come across cell mode before.
kfir
kfir on 28 Mar 2012
try looking in the "text" menu. Ctrl+R appears there.
Cell mode is a very nice tool, from Matlab 7 and above.
I also liked the answer given by Daniel. Very simple, and you can unfold all the "if" statement.
Miguel Ordoñez
Miguel Ordoñez on 31 Mar 2018
Does anyone know if there is a command similar to Ctrl + R for Mac OS? Thanks

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More Answers (2)

Daniel Shub
Daniel Shub on 28 Mar 2012
You can enclose code in an if block
if false
...
end
or even better (since you can include invalid syntax) would be to use block comments
%{
...
%}
The nice thing with block comments is that you can comment the comment
%%{
...
%}
to reactivate the code. The only thing to be careful with is if you auto indent and/or autowrap the code in the block comment your line breaks can get screwed up.

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Jason Ross
Jason Ross on 28 Mar 2012
Usually when I get to a place where the code has gotten this large, a little voice in my head starts screaming "PUT IT IN A FUNCTION" (or subroutine, or module, or whatever means the language I'm coding in has to compartmentalize a section of code). That way I can separate the overall program flow from the detailed bit of what each step of the program is doing. And then it becomes simple to control that flow with a comment or other conditional method.

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