can I disable entire sections of code temporarily

Question

Tom 2012-3-28

3
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编辑： Mung Suan Pau DUHLIAN 2021-12-12

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.

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Giovanni Guerrero 2016-5-5

编辑：Giovanni Guerrero 2016-5-5

comment out the lines using (hold) ctrl then R then undo this by (hold) ctrl then T

Kabilan Nedunchezian 2017-2-2

在 MATLAB Online 中打开

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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Answer 1

kfir 2012-3-28

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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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Miguel Ordoñez 2018-3-31

Does anyone know if there is a command similar to Ctrl + R for Mac OS? Thanks

Mung Suan Pau DUHLIAN 2020-8-8

编辑：Mung Suan Pau DUHLIAN 2021-12-12

Select the code/s you want to temporarily disable ( or comment) and press (Command and / )
To undo the disable (or discomment ) select the code/s and press (Command and T)
Hope this is relevant:).

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Answer 2

Daniel Shub 2012-3-28

7
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在 MATLAB Online 中打开

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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Answer 3

Jason Ross 2012-3-28

4
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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.