Error: checkdata at 381 This function requires raw data as input

[Natalia Grion]

I'm being running fieldtrip-20090629, but i also test this problem for a
newest version (fieldtrip-20100418) that gave me the same error. I also
tried to go into the error to see which is the cause: when inspecting
checkdata result on the line
israw      = datatype(data, 'raw');
gives me israw= 0
which is not the case on my data as it has all the fields and types
necessary to be classified as "israw"
israw      = isfield(data, 'label') && isfield(data, 'time') &&
isa(data.time, 'cell') && isfield(data, 'trial') && isa(data.trial,
'cell');
I explained before that when running checkdata independently of
freqanalysis it works.
hope this info also helps,
natalia


> Adding to Roemer's questions:
>
> What is the fieldtrip version you are using?
> Next to this, it is also insightful/helpful to look into what causes
> the error yourself: if you type dbstop if error on the command line,
> when the function crashes you end up within the local workspace of the
> crashing function,  allowing you to investigate the cause of your error.
>
> Best,
>
> Jan-Mathijs
>
> On May 7, 2010, at 4:12 PM, Roemer van der Meij wrote:
>
>> Hi Natalia,
>>
>> Could you post the cfg-settings you use when calling ft_freqanalysis
>> and the full matlab error output? This will help us track down the
>> cause of the error. Also, did you use ft_appenddata for appending
>> your recordings or did you do it by hand?
>>
>> Best,
>> Roemer
>>
>>
>>
>>
>> On 5/7/2010 4:06 PM, Natalia Grion wrote:
>>> Dear all,
>>>          I have this error when running freqanalysis:
>>> ??? Error using ==>  checkdata at 381
>>> This function requires raw data as input.
>>> My data comes from a preprocessing procedure where i just append
>>> daily
>>> sessions with 8 channel lfp recordings and several trials from the
>>> same
>>> subject) and it has this shape:
>>>
>>>         hdr: [1x1 struct]
>>>       label: {8x1 cell}
>>>       trial: {1x349 cell}
>>>        time: {1x349 cell}
>>>     fsample: 2003
>>>         cfg: [1x1 struct]
>>>
>>> when i run checkdata alone I obtain the message i expect:
>>> B =  checkdata( data, 'datatype', 'raw', 'feedback', 'yes',
>>> 'hasoffset','yes');
>>> the input is raw data with 8 channels and 349 trials
>>> This error message sounds odd to me as I never had this problem in
>>> the past.
>>> I changed to Matlab 2009a in a 64bit win system (Could this info
>>> help to
>>> solve the problem?)
>>> Any idea?
>>> Thanks in advance.
>>> Natalia
>>>
>>>
>>>
>>>
>>> ----------------------------------------------------------------
>>>   SISSA Webmail https://webmail.sissa.it/
>>>   Powered by SquirrelMail http://www.squirrelmail.org/
>>>
>>> ----------------------------------
>>> The aim of this list is to facilitate the discussion between users
>>> of the FieldTrip  toolbox, to share experiences and to discuss new
>>> ideas for MEG and EEG analysis. See also
>>> http://listserv.surfnet.nl/archives/fieldtrip.html
>>>  and http://www.ru.nl/neuroimaging/fieldtrip.
>>>
>>
>> --
>> Roemer van der Meij MSc
>> Scientific Programmer&  Data-Analyst
>> Donders Institute for Brain, Cognition and Behaviour
>> Centre for Cognition
>> P.O. Box 9104
>> 6500 HE Nijmegen
>> The Netherlands
>> Tel: +31(0)24 3612631
>> E-mail: r.vandermeij at donders.ru.nl
>>
>> ----------------------------------
>> The aim of this list is to facilitate the discussion between users
>> of the FieldTrip  toolbox, to share experiences and to discuss new
>> ideas for MEG and EEG analysis. See also
>> http://listserv.surfnet.nl/archives/fieldtrip.html
>>  and http://www.ru.nl/neuroimaging/fieldtrip.
>
> Dr. J.M. (Jan-Mathijs) Schoffelen
> Donders Institute for Brain, Cognition and Behaviour,
> Centre for Cognitive Neuroimaging,
> Radboud University Nijmegen, The Netherlands
> J.Schoffelen at donders.ru.nl
> Telephone: 0031-24-3668063
>
> ----------------------------------
> The aim of this list is to facilitate the discussion between users of the
> FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG
> and EEG analysis. See also
> http://listserv.surfnet.nl/archives/fieldtrip.html and
> http://www.ru.nl/neuroimaging/fieldtrip.
>



----------------------------------------------------------------
  SISSA Webmail https://webmail.sissa.it/
  Powered by SquirrelMail http://www.squirrelmail.org/

----------------------------------
The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html and http://www.ru.nl/neuroimaging/fieldtrip.