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command window no output

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Shane Sullivan
Shane Sullivan on 21 Sep 2020
Commented: Walter Roberson on 29 Sep 2023
So something happened and my Matlab is no longer outputing results in the command window. Even if in the command windows I type '5*5' and hit enter, it just gives me a new lines, it does not output the results. And no, there is no semicolon after it. Error messages are not displaying there, pretty much nothing. Tried restarting several times too. Any ideas?
  2 Comments
Paul Barrette
Paul Barrette on 29 Sep 2023
Edited: Paul Barrette on 29 Sep 2023
I had the same problem as what @Shane Sullivan is describing. I spent 1-2 hours searching for an answer before finding this one (most others were about using a ';' or not, which was not relevant to my case). Coincidentally, I had to upload a new version of Matlab (2023b). Which I did - that solved the problem.
Walter Roberson
Walter Roberson on 29 Sep 2023
Was MATLAB processing the commands? For example if you typed in a graphics command would the graphics be produced? If you typed in a for loop, was it taking time to execute the loop even if nothing was being displayed?
I am trying to distinguish here between "was not executing the commands" and "was executing the commands but no output" (and, I suppose, "was executing the commands and screen scrolled about as many lines as you would expect, but nothing of the output was visible -- such as could happen with a font problem)

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Accepted Answer

Shane Sullivan
Shane Sullivan on 25 Sep 2020
Not sure what exactly was the problem, but I did the total reset function described by Jan here: https://www.mathworks.com/matlabcentral/answers/1093-how-do-i-reset-matlab-to-its-launched-state
After running it and restarting, command window works.
  3 Comments
Image Analyst
Image Analyst on 25 Sep 2020
The exclamation point runs the stuff after it as if you had typed in into a console window of the operating system.
Adam Danz
Adam Danz on 25 Sep 2020
Oh, thanks! I didn't know that.

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More Answers (2)

Image Analyst
Image Analyst on 21 Sep 2020
  4 Comments
Shane Sullivan
Shane Sullivan on 25 Sep 2020
My apologizes if I misinterperted your response.
Image Analyst
Image Analyst on 25 Sep 2020
In case anyone else has that problem, it would be nice for them if you came back here and tell us what tech support's solution was, even if it was to just uninstall and re-install. Thanks in advance.

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Jan
Jan on 21 Sep 2020
Edited: Jan on 21 Sep 2020
Check if you have shadowed the display function:
w = cellstring(which('display', '-all'));
fprintf('%s\n', w{:})
What do you see?
Maybe fprintf is impeded also. Then:
file = fullfile(tempdir, 'myOutput.txt');
fid = fopen(file, 'w');
fprintf(fid, '%s\n', w{:});
fclose(fid)
edit(file)
  3 Comments
Jan
Jan on 24 Sep 2020
The 2nd code writes the needed output to a file, not to the command window. It would help to analyse your problem, if you post the contents of this file.
Did you create a function called "display.m"?
Shane Sullivan
Shane Sullivan on 25 Sep 2020
The file also has nothing in it. It is blank. No, I did not create a function called display.m either.

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