Change in MATLAB path set by ft_defaults

[gllmflndn]

I observe that the MATLAB path changes when ft_defaults is called twice - in particular, the paths to the MATLAB toolbox replacements get removed.

In this example, MATLAB's ver reports this:

>> ver
-----------------------------------------------------------------------------------------------------
MATLAB Version: 9.13.0.2049777 (R2022b)
-----------------------------------------------------------------------------------------------------
MATLAB                                                Version 9.13        (R2022b)                              
FieldTrip                                             Version unknown     www.fieldtriptoolbox.org
Image Processing Toolbox                              Version 11.6        (R2022b)                   

If ft_defaults is called a first time, MATLAB's path contains:

>> path

		MATLABPATH
[...]
	/home/github/fieldtrip/external/fileexchange
	/home/github/fieldtrip/external/stats
	/home/github/fieldtrip/external/signal
	/home/github/fieldtrip/utilities
	/home/github/fieldtrip

If I then call:

clear all
ft_defaults;

MATLAB's path now does not have the stats and signal toolbox any more:

>> path

		MATLABPATH

[...]
	/home/github/fieldtrip/external/fileexchange
	/home/github/fieldtrip/utilities
	/home/github/fieldtrip
	/home/github/Documents/MATLAB

[robertoostenveld]

Could you check what your ft_default global variable is at the different stages? I suspect that the ft_default.toolbox.signal options are different at the moment the path is handled, and that your clear all clears the global variable.

[robertoostenveld]

>> restoredefaultpath
>> which filtfilt
/Applications/MATLAB_R2023b.app/toolbox/signal/signal/filtfilt.m
>> ft_defaults
...
>> which filtfilt
/Users/roboos/matlab/fieldtrip/external/signal/filtfilt.m
>> clear all
>> ft_defaults
...
>> which filtfilt
/Users/roboos/matlab/fieldtrip/external/signal/filtfilt.m

for me it remains consistent, because of the detection of the 38957 license.

[gllmflndn]

Here is what I see with the same example (the Signal Processing Toolbox is not installed):

>> restoredefaultpath
>> which filtfilt
'filtfilt' not found.
>> addpath /home/github/fieldtrip
>> ft_defaults
...
>> which filtfilt
/home/github/fieldtrip/external/signal/filtfilt.m
>> clear all
>> ft_defaults
...
>> which filtfilt
'filtfilt' not found.