[FieldTrip] Problem running tutorial

[Dillon, Daniel G.]

Hi everyone. I’m new to FieldTrip and am excited to try it but I can’t get the tutorials started. I’ve downloaded fieldtrip-20190819 and I’m running MATLAB_R2015b. I’m trying to run the “Trigger-based trial selection tutorial” (http://www.fieldtriptoolbox.org/tutorial/preprocessing/), but when I type “ft_definetrial(cfg)” in MATLAB it returns the long error pasted at the end of this email. It looks like there is a problem with the “isfolder” function, and since the warning message points me to the documentation about setting paths (http://bit.ly/2SPPjUS), I also tried re-setting everything by typing this . . .

>> restoredefaultpath
>> addpath /Applications/MATLAB_R2015b.app/toolbox/fieldtrip-20190819/
>> ft_defaults

. . . but I get the same error message. I think this may be a backwards compatibility issue but I’m not sure how to troubleshoot it. Can anyone point me in the right direction?

Thanks!

Dan Dillon
McLean Hospital


          Here’s the error message:

          Warning: removing
"/Applications/MATLAB_R2015b.app/toolbox/fieldtrip-20190819/compat/matlablt2017b" from your path,
see http://bit.ly/2SPPjUS
> In isfolder (line 21)
  In ft_version (line 64)
  In ft_preamble_init (line 50)
  In ft_preamble (line 83)
  In ft_definetrial (line 128)
Error using feval
Undefined function 'isfolder' for input arguments of type 'char'.

Error in isfolder (line 27)
    [varargout{1:nargout}] = feval(mfilename, varargin{:});

Error in ft_version (line 64)
  issvn = isfolder(fullfile(ftpath, '.svn'));

Error in ft_preamble_init (line 50)
[FjmoT6aA_ft_ver, FjmoT6aA_ft_path] = ft_version;

Error in ft_preamble (line 83)
evalin('caller', full_cmd);

Error in ft_definetrial (line 128)
ft_preamble init

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