fprintf to print to both file and command window

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Louis
Louis 2020-4-29
评论： Louis 2020-5-2
I'd like to run a single fprintf operation to print to both command window and file.
I know that the below command only print to 'log.txt' file:
fid = fopen('log.txt', 'w');
fprintf(fid, 'start logging\n');
And below will only print to command window:
fprintf('start logging\n');
Is there a way to print to both without calling fprintf twice?
Thanks,

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采纳的回答

the cyclist
the cyclist 2020-4-29
I doubt it.
I'm not sure what your goal is, but it would certainly be trivial to write your own small function. Something like
function [] = writeToScreenAndFile(fid,str)
fprintf(fid, str);
fprintf(str);
end
  1 个评论
Louis
Louis 2020-4-29
The goal is to have a log file which logs desired stutus messages. However, I also would like the log messages to appear on the command window as well.

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更多回答（1 个）

Ameer Hamza
Ameer Hamza 2020-4-29
编辑：Ameer Hamza 2020-4-29
Read my answer here: https://www.mathworks.com/matlabcentral/answers/516548-using-fprintf-to-write-to-multiple-files-simultaneously#answer_424960 which answers this exact question. It suggests two methods: create a custom function or overloading fprintf function.

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