Working backwards from a command window

Question

Alex 2013-4-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/72053-working-backwards-from-a-command-window

Hey all, I had a strange question that I couldn't find an answer for, perhaps I could get some help here?

A friend of mine was working on an m file for an assignment, and had been executing it to see the results. After deleting the trash on her user account, the m file vanished from the harddrive, but all the outputs from the execution of said m file remained in the command window, which brings me to the question:

Is it possible to use Matlab to work backward from the results in the command window to recover the commands from the m file? Since Matlab was dependent on those commands to generate the output I mean. I also am not looking for an intuitive 'you can see the output, so you can manually discern the m file's contents' type solution.

I hope that makes sense?

--Alex--

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Jan 2013-4-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/72053-working-backwards-from-a-command-window#answer_82248

编辑：Jan 2013-4-15

在 MATLAB Online 中打开

No, this will not work in general.

An exception would be, if a echo on all enabled the display of all processed code during the program runs. But without this there is no chance to use the output to the command window to decide, which code has created this output. Example:

% Command window:
2
% Possible codes:
x = [pi, sin(1.234)];
fprintf('%d\n', length(x))
% Or:
x = clock;
fprintf('%d\n', x(5))

And this is a very trivial example only.

But it would be trivial to reconstruct the deleted file in the leven of the operating system. Deleting does not overwrite the biots on the harddisk, but removes the point in the file system table only.