Is there a way to suppress command outputs to command window?

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Ehsan na
Ehsan na 2014-5-16
回答： Steven Lord 2025-5-3
Hello guys, I know I can use ; in the end of the commands to prevent them from echoing to the command windows. But now, my situation is that I have a very long code, dispersed in so many m files.
Several command in them, on purpose, for sake of reporting the status, (and useful for debugging( do not have semicolons. Now I am running the code in a loop, and I think having all these outputs slows the process.
How can I suppress all command outputs, without manually going through the long code and putting a semicolon on each line?
Bonus question: There are some disp functions as well that report to the command line. can I also suppress them?
Thanks

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回答（6 个）

Sean de Wolski
Sean de Wolski 2014-5-16
evalc('yourmainfile');
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Sven
Sven 2015-10-8
Thanks a lot! Worked for me for suppressing command line outputs of a model dependency function:
evalc('[files, ~, ~, ~] = dependencies.fileDependencyAnalysis(ModelName, ''manifestfile'')');

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Jos (10584)
Jos (10584) 2014-5-16
编辑：Jos (10584) 2014-5-16
You can create a function in the current directory or top directory of the path called disp.m and put the following single line of code in there:
function thisdoesnothing (varargin)
If you need to use DISP again, just change the name of the m-file to something else (e.g. thisdoesnothing.m)
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Ehsan na
Ehsan na 2014-5-16
Thanks a very good solution to suppress the DISP function outputs!
Is it possible that instead of overloading disp function by creating another m-file named disp.m, I create a function named disp inside my main file (main_prog.m), but it gets a GLOBAL scope so that it also will be accessible from subcode_1.m in the run time? (subcode_1.m is called from within the main_prog.m in the run time)

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Azzi Abdelmalek
Azzi Abdelmalek 2014-5-16
fid1 = fopen('your_file.m');
fid2=fopen('new_file.m','w')
res={};
while ~feof(fid)
line1 =[fgetl(fid) ';'];
res{end+1,1}=line1
fprintf(fid2,'%s \r\n',line1)
end
fclose(fid1);
fclose(fid2);
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Azzi Abdelmalek
Azzi Abdelmalek 2014-5-16
I didn't change your file, just created another one, you can choose to run the first or second one

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Steven Lord
Steven Lord 2025-5-3
Ran in:
If you're using a sufficiently recent release of MATLAB, create a codeIssues object for the file then call fix with the object and the CheckID of the issues you want to fix as inputs.
dbtype myfun129872.m % Note line 2 is missing its semicolon
1 function y = myfun129872(x) 2 y = x.^2
issues = codeIssues('myfun129872.m')
issues =
codeIssues with properties: Date: 03-May-2025 23:51:30 Release: "R2024b" Files: "/users/mss.system.7c99x/myfun129872.m" CodeAnalyzerConfiguration: "active" Issues: [1x10 table] SuppressedIssues: [0x11 table] Issues table preview Location Severity Fixability Description CheckID LineStart LineEnd ColumnStart ColumnEnd FullFilename _______________ ________ __________ _________________________________________________________________________ _______ _________ _______ ___________ _________ _______________________________________ "myfun129872.m" info auto "Add a semicolon after the statement to hide the output (in a function)." NOPRT 2 2 3 3 "/users/mss.system.7c99x/myfun129872.m"
% fix(issues, "NOPRT")
I didn't make the fix call executable in Answers because I wanted to show you the file with the code issue present and didn't want to have to keep replacing the file each time I ran the code. I did run it in a local session of MATLAB, however, and confirmed it added the semicolon.
Henric Rydén
Henric Rydén 2014-5-16
echo off
Matt J
Matt J 2025-5-3
As a partial solution, you can use favoriteForceSemicolons.m from this File Exchange download,
https://www.mathworks.com/matlabcentral/fileexchange/181000-customized-text-modification-buttons-for-the-matlab-editor
It is easiest if you install it as a Quick Access button, as recommended in the Desciption section of the submission.
With this, you can open a file in the Matlab Editor and do Select All (Ctrl-A) in a given file. When you apply favoriteForceSemicolons(), it will add semicolons to all relevant lines of code. I don't know if there is a way to automate this process across multiple files, however.

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