Undefined function or variable

When I tried to run the file "project.m" in the folder "C:\Users\MyName\Documents\MATLAB", it always showed the error "Undefined function or variable 'project'" even though I already set PATH for MATLAB to point to that MATLAB folder. I have a student license lasting till Oct 31, 2018

[Guillaume]

"even though I already set PATH for MATLAB"

Clearly, that did not work. How do you set the matlab path?

[Thao Ha]

I already set PATH for MATLAB to point to "C:\Users\MyName\Documents\MATLAB"

[Walter Roberson]

Please show the output of:

folder = 'C:\Users\Thao Ha\Documents\MATLAB';
if ~exist(folder, 'dir')
  fprintf('folder "%s" does not exist?\n', folder);
else
  dinfo = dir( fullfile(folder, 'project*.*') );
  if isempty(dinfo)
    fprintf('folder "%s" does not have any project*.* files\n', folder);
  else
     fprintf('project*.* files in folder "%s" are:\n', folder);
     celldisp({dinfo.name});
     fprintf('\n');
  end

    dinfo = dir( fullfile(folder, '*.m') );
    if isempty(dinfo)
      fprintf('folder "%s" does not have any *.m files\n', folder);
    else
       fprintf('*.m files in folder "%s" are:\n', folder);
       celldisp({dinfo.name});
       fprintf('\n');
    end
  end

[Thao Ha]

<<

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>>

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[Walter Roberson]

You accidentally copied my code as 'dir ' instead of 'dir'. Also you copied

      dinfo = dir( fullfile(folder, '*.m') );

as

      dinfo = dir( fullfile(folder, '*.m ') );

I have attached the code as a .m file that you can download and run.

[Thao Ha]

It shows >> testpath Undefined function or variable 'testpath'.

[Walter Roberson]

Download it into a directory, cd to the directory and try

run('testpath.m')

[Walter Roberson]

Please show the output of executing

which path
which matlabpath
matlabpath

inside MATLAB

[Thao Ha]

>> which path
C:\Program Files\MATLAB\R2017b\toolbox\matlab\general\path.m
>> which matlabpath
built-in (C:\Program Files\MATLAB\R2017b\toolbox\matlab\general\matlabpath)
>> matlabpath

    MATLABPATH

  C:\Users\Thao Ha\Documents\MATLAB
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\addons
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\addons\cef
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\addons\fallbackmanager
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\addons\supportpackages
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\addons_product
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\supportpackagemanagement
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\addons_toolbox
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\addon_enable_disable_management\matlab
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\appdesigner\appdesigner
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\appdesigner\appdesigner\interface
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\appdesigner\appdesigner\runtime
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\apps
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\audiovideo
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\cefclient
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\configtools
  C:\Program Files\MATLAB\R2017b\toolbox\matlab\connector2\common
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  C:\Program Files\MATLAB\R2017b\toolbox\shared\supportpkgservices\legacysupportpkginfo
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  C:\Program Files\MATLAB\R2017b\toolbox\shared\supportsoftware\services
  C:\Program Files\MATLAB\R2017b\toolbox\shared\supportsoftware\upgrade
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  C:\Program Files\MATLAB\R2017b\toolbox\shared\simulink
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[Walter Roberson]

Try

cd('C:\Users\Thao Ha\Documents\MATLAB')
ls('p*.m') + 0

and show us the output

[Thao Ha]

>> cd('C:\Users\Thao Ha\Documents\MATLAB ')
>> ls('p*.m') + 0

ans =

     112   114   111   106   101    99   116    46   109

[Walter Roberson]

You have a space at the end of 'MATLAB ' in the test that worked. If that space is part of the directory name then you are going to confuse people including yourself.

cd('C:\Users\Thao Ha\Documents\MATLAB ')

is not the same as

cd('C:\Users\Thao Ha\Documents\MATLAB')

[Thao Ha]

I have deleted that space but still get the same output as above.

>> cd('C:\Users\Thao Ha\Documents\MATLAB')

>> ls('p*.m') + 0

ans =

   112   114   111   106   101    99   116    46   109

[Walter Roberson]

What happens if you

cd('C:\Users\Thao Ha\Documents\MATLAB')
run('project.m')

[Thao Ha]

'project' is not found in the current folder or on the MATLAB path, but exists in:

      C:\DATA\WSU-Thao\Fall 2017\MATLAB

Change the MATLAB current folder or add its folder to the MATLAB path.

Error in run (line 91)

evalin('caller', strcat(script, ';'));

[Walter Roberson]

Please go back to the testpath.m that I posted in https://www.mathworks.com/matlabcentral/answers/370999-undefined-function-or-variable#comment_512503 and download it to a directory, and cd to that directory, and

run('testpath.m')

[Thao Ha]

>> run('testpath.m')

Error using evalin

Undefined function or variable 'testpath'.

Error in run (line 91)

evalin('caller', strcat(script, ';'));

[KL]

What happens if you close matlab and double-click open your m-file from your file explorer. That should open the file with its corresponding folder as working directory.

[Thao Ha]

It still shows:

project 'project' is not found in the current folder or on the MATLAB path, but exists in: C:\DATA\WSU-Thao\Fall 2017\MATLAB

Change the MATLAB current folder or add its folder to the MATLAB path.

Answer 1

[KL]

You still haven't answered how you set the path. Use addpath,

 addpath('C:\Users\MyName\Documents\MATLAB')

read more here: https://de.mathworks.com/help/matlab/ref/addpath.html

[Thao Ha]

I set matlab PATH by clicking on the "Set Path" icon on toolbar. I have followed your instruction to use addpath command but it did not help. The error still remains.

Answer 2

[Walter Roberson]

You need to contact Mathworks for installation support.