[FieldTrip] "not enough input" probelm in ft_artifact_zvalue tutorial code

[Andrew Chang]

Dear all,

Sorry for asking another naive question.
I am following the tutorial code of this:
http://www.fieldtriptoolbox.org/tutorial/automatic_artifact_rejection
I used the ArtifactMEG.ds data, which is used in tutorial, and used the
exact same code. However, I am unable to run the ft_artifact_zvalue
function. I am running this code on MATLAB2015b with fieldtrip
version 20160304. I got the same problem even I changed the MATLAB version
into 2013a.
I am really confused since I am running the exact same code as tutorial,
but I got many warnings and MATLAB returned error too.

Here is the script:

cfg                    = [];
cfg.dataset            = 'ArtifactMEG.ds';
cfg.headerformat       = 'ctf_ds';
cfg.dataformat         = 'ctf_ds';
cfg.trialdef.eventtype = 'trial';
cfg                    = ft_definetrial(cfg);
trl                    = cfg.trl(1:50,:);

%% jump
cfg                    = [];
cfg.trl = trl;
cfg.datafile   = 'ArtifactMEG.ds';
cfg.headerfile = 'ArtifactMEG.ds';
cfg.continuous = 'yes';

% channel selection, cutoff and padding
cfg.artfctdef.zvalue.channel    = 'MEG';
cfg.artfctdef.zvalue.cutoff     = 20;
cfg.artfctdef.zvalue.trlpadding = 0;
cfg.artfctdef.zvalue.artpadding = 0;
cfg.artfctdef.zvalue.fltpadding = 0;

% algorithmic parameters
cfg.artfctdef.zvalue.cumulative    = 'yes';
cfg.artfctdef.zvalue.medianfilter  = 'yes';
cfg.artfctdef.zvalue.medianfiltord = 9;
cfg.artfctdef.zvalue.absdiff       = 'yes';

% make the process interactive
cfg.artfctdef.zvalue.interactive = 'yes';

[cfg, artifact_jump] = ft_artifact_zvalue(cfg);



Here are what MATLAB return to me:

Warning: no trialfun was specified, using ft_trialfun_general
> In ft_definetrial (line 138)
evaluating trialfunction 'ft_trialfun_general'

getRawCTFBalanceCoefs : Sensor Q11 appears in ds.res4.scrr, but not in
ds.res4.chanNames

Warning: cannot read balancing coefficients for G3BR
> In ft_read_header (line 569)
  In ft_trialfun_general (line 78)
  In ft_definetrial (line 177)
reading the events from 'ArtifactMEG.ds\ArtifactMEG.res4'

getRawCTFBalanceCoefs : Sensor Q11 appears in ds.res4.scrr, but not in
ds.res4.chanNames

Warning: cannot read balancing coefficients for G3BR
> In ft_read_header (line 569)
  In ft_read_event (line 511)
  In ft_trialfun_general (line 86)
  In ft_definetrial (line 177)
found 76 events
created 76 trials
the call to "ft_definetrial" took 1 seconds

ans =

     []


getRawCTFBalanceCoefs : Sensor Q11 appears in ds.res4.scrr, but not in
ds.res4.chanNames

Warning: cannot read balancing coefficients for G3BR
> In ft_read_header (line 569)
  In ft_artifact_zvalue (line 195)
searching for artifacts in 139 channels
searching in trial 50 from 50

Not enough input arguments.

Error in ft_artifact_zvalue (line 481)
  opt.data = data;




Any comments are appreciated! Thank you all!

Best,
Andrew


-- 
Andrew Chang
Ph.D. Candidate
Auditory Development Lab
Department of Psychology, Neuroscience & Behaviour
McMaster University
http://changa5.wordpress.com/
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