when I run an m-file, Is there a way to "change current folder" to the folder that this m-file is placed, by means of some commands at the beginng of the file ?

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Dimitris Kalogiros
Dimitris Kalogiros 2018-9-17
评论： Stephen23 2018-9-17
I have a m-file, for example mytest.m and at the beginning of it , I would like to place a command (or commands), in order to "change current folder" into the folder that mytest.m is placed. This change of the folder has to be done, provided that we don't know the folder of mytest.m.
Is it feasible ?
Thanks in advance
  1 个评论
Stephen23
Stephen23 2018-9-17
"Is it feasible ?"
Feasible... yes.
Good idea... unlikely.
Changing directories is slow, and makes debugging much harder.
All MATLAB functions that read/write files accept absolute/relative filenames (which are much more efficient than changing directories), so why not just do that?
https://www.mathworks.com/help/matlab/matlab_env/specify-file-names.html

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Walter Roberson
Walter Roberson 2018-9-17
mfileinfo = mfilename('fullpath');
mfiledir = fileparts(mfileinfo);
olddir = pwd;
onCleanup(@() cd(olddir));
cd(mfiledir);
The above will also cd back to the previous directory when the function exits.

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