[FieldTrip] Error using ft_read_header
Stephen Whitmarsh
stephen.whitmarsh at gmail.com
Tue Jun 23 15:50:48 CEST 2020
Hi Alina,
Have you asked a colleague to try it out to rule-out something to do with
the matlab installation?
Cheers,
Stephen
Op di 23 jun. 2020 om 15:30 schreef Bondarenko, Alina I <
alina.bondarenko19 at imperial.ac.uk>:
> Dear Stephen,
>
> Thanks for the quick response!
>
> I have been initially using another function, ft_read_data (which calls on
> ft_read_header) as part of some code to load and convert .mat files to .csv
> files - and it was in this code that the bug/error first showed up.
>
>
> filename = 'my_data.mat';
>
> dat = ft_read_data(filename);
>
> writematrix(dat, 'my_data.csv')
>
>
> Error using feval
> Attempt to execute SCRIPT matlab as a function:
> /Applications/MATLAB_R2019b.app/toolbox/matlab/general/matlab.m
>
> Error in ft_read_header (line 2594)
> hdr = feval(headerformat, filename);
>
> Error in ft_read_data (line 214)
> hdr = ft_read_header(filename, 'headerformat', headerformat, 'chanindx',
> chanindx, 'checkmaxfilter', checkmaxfilter);
>
>
>
> There are other ways of converting .mat to .csv files, so that's not a
> huge problem, however, it seems that whenever I use any function that
> requires/calls on ft_read_header the same error comes up. So, I haven't
> been able to use quite a few Field Trip functions as a result.
>
> I am working with data that has been preprocessed by another lab, so
> unfortunately I don't have more code than this to show you. However, I get
> the same error with a different dataset, which I was also previously able
> to run through these functions without a problem.
>
> Thank you in advance for your time!
>
> Best,
> Alina.
> ------------------------------
> *From:* fieldtrip <fieldtrip-bounces at science.ru.nl> on behalf of Stephen
> Whitmarsh <stephen.whitmarsh at gmail.com>
> *Sent:* 23 June 2020 13:04
> *To:* FieldTrip discussion list <fieldtrip at science.ru.nl>
> *Subject:* Re: [FieldTrip] Error using ft_read_header
>
>
> This email from stephen.whitmarsh at gmail.com originates from outside
> Imperial. Do not click on links and attachments unless you recognise the
> sender. If you trust the sender, add them to your safe senders list
> <https://spam.ic.ac.uk/SpamConsole/Senders.aspx> to disable email
> stamping for this address.
>
>
> Dear Alina,
>
> Not sure there is not something more sinister at play in the code
> somewhere (I mean a bug or installation error), but I would start by asking
> why you are using * ft_read_header *to load a .mat file?
>
> Are you sure you don't just want to load the matfile with MATLAB's load
> functions? I.e. header = load('myfilename.mat')? Or, otherwise, read the
> header of an original EEG/MEG datafile (some EEG/MEG dataformat)?
>
> If not, and for a more informed response, please specify a bit more of the
> code you use to process/write and then (try to) load the header.
>
> Cheers,
> Stephen
>
>
>
> Op di 23 jun. 2020 om 13:30 schreef Bondarenko, Alina I <
> alina.bondarenko19 at imperial.ac.uk>:
>
> Hello all,
>
>
> I'll try to describe the problem I've been having as clearly as I can here:
>
> - I'm trying to use a Field Trip function *ft_read_header *to load
> some .mat files.
>
> - When I try to load up a file using *ft_read_header,* I get an error
> message saying that within the *ft_read_header *script, the function
> *feval* is being used incorrectly. Namely, that *feval* is trying to
> execute a script called *matlab* as if it were a function.
>
> Error using feval
> Attempt to execute SCRIPT matlab as a function:
> /Applications/MATLAB_R2019b.app/toolbox/matlab/general/matlab.m
>
> - When I look inside the *ft_read_header* script, the line (2594) that
> gives the error looks like this:
>
> feval(headerformat, filename)
>
> Where *headerformat* is assigned a string 'matlab', which is supposed
> to represent the file type of the file I'm trying to load. Filename is a
> string variable I assign, e.g. filename = 'session1.mat'.
>
> Headerformat is assigned the string 'matlab' in line 203 of
> *ft_read_header *(found in debugging mode):
>
> headerformat = ft_filetype(filename);
>
>
> - Feval is supposed to "evaluate a function" (I'm not quite sure
> exactly what this means based on the documentation), but it's first
> argument is supposed to be a function name, so I guess that a string saying
> 'matlab' should have always thrown an error, but the thing is that this
> function used to work just fine for me before. I also haven't edited any of
> the built in Field Trip scripts, so I'm not sure why this has stopped
> working.
>
>
>
> Here are some things I've tried to fix the problem:
>
>
> - I looked up the 'executing script as function error' and thought
> that since Matlab would like to execute a function, but is instead
> executing a script of the same name, then changing the name of the script
> could stop the problem.
>
> However, when I change the name of the matlab.m script (e.g. to
> matlab_change.m) I get this error message instead:
>
> Error using feval
> Previously accessible file
> "/Applications/MATLAB_R2019b.app/toolbox/matlab/general/matlab.m" is
> now inaccessible.
>
> The only file called matlab.m is a short text file containing some
> info about what Matlab is and what it can be used for (I used "*which
> matlab -all"* to check this). There are no functions called matlab.
>
> - In between the time when this function was working fine for me, and
> when it started showing me this error, I installed several versions of OSL
> and SPM on my computer. So, I uninstalled all these things.
> - Uninstalled and reinstalled Field Trip
> - Uninstalled and reinstalled Matlab
> - Copy pasted all the functions involved and saved these under
> different names in different folders. Tried running them - got the same
> error.
>
>
> I would greatly appreciate anyone's help on this! This error has been
> driving me crazy.
>
> All the best,
> Alina.
>
>
> _______________________________________________
> fieldtrip mailing list
> https://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> https://doi.org/10.1371/journal.pcbi.1002202
>
> _______________________________________________
> fieldtrip mailing list
> https://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> https://doi.org/10.1371/journal.pcbi.1002202
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20200623/af2b5f44/attachment.htm>
More information about the fieldtrip
mailing list