[Eeglablist] Error when precomputing channel measures for between subjects study design

[Makoto Miyakoshi]

Dear Gladys,

Unfortunately I don't do channel analysis at the group level so not very
knowledgeable here, but I can still recommend that you interpolate all the
channels before creating the group level. This can't fail.

Makoto



On Mon, Feb 13, 2017 at 10:47 PM, #HENG JIAMIN GLADYS# <
JHENG007 at e.ntu.edu.sg> wrote:

> Hi all,
>
>
> I am wondering if there were updates regarding this topic of "Datasets to
> be concatenated do not have the same number of channels"?
>
>
> For my situation, bad channels were removed before entering each subject's
> data files in STUDY design. Hence, the number of channels for each subject
> file in my dataset is not the same.
>
>
> Thank you in advance for the help.
>
>
> Regards,
>
> Gladys
> ------------------------------
> *From:* eeglablist-bounces at sccn.ucsd.edu <eeglablist-bounces at sccn.ucsd.edu>
> on behalf of Schneider, Julie <jxs114631 at utdallas.edu>
> *Sent:* Thursday, April 21, 2016 11:21:54 PM
> *To:* alyson.abel at mail.sdsu.edu; mmiyakoshi at ucsd.edu
>
> *Cc:* EEGLAB List
> *Subject:* Re: [Eeglablist] Error when precomputing channel measures for
> between subjects study design
>
>
> Hi Makoto,
>
>
> Thank you very much for your kind response and I will move forward with
> filing this problem as a bug.
>
>
> Best Regards,
>
> Julie
> ------------------------------
> *From:* Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
> *Sent:* Wednesday, April 20, 2016 10:15:58 PM
> *To:* alyson.abel at mail.sdsu.edu; Schneider, Julie
> *Cc:* EEGLAB List
> *Subject:* Re: [Eeglablist] Error when precomputing channel measures for
> between subjects study design
>
> Dear Julie and Alyson,
>
> Sorry for getting back to you late Julie. I thought I've responded to you
> but I did not.
> I talked to a developer and confirmed that this particular problem is not
> filed yet. He did mention that there was potentially related one filed
> already, but he was not sure about the relevance. I feel terribly sorry but
> could you please file the problem here? You can basically copy and paste
> what you have described in the email.
> https://sccn.ucsd.edu/bugzilla/enter_bug.cgi
> I deeply appreciate your patience and cooperation.
>
> Makoto
>
> On Wed, Apr 13, 2016 at 11:18 AM, Alyson Abel <amills at mail.sdsu.edu>
> wrote:
>
>> I actually have been having this same issue. I am trying to run a 2 group
>> x 6 condition study. All datasets look fine (and all have 64 channels) when
>> I load them but I get the same error as reported by Julie "Datasets to
>> be concatenated do not have the same number of channels" . I am using
>> MATLAB R2014a and the latest EEGLAB.
>>
>> Thank you for any feedback on this issue,
>> Alyson
>>
>>
>>
>> Re: [Eeglablist] Error when precomputing channel measures for between
>> subjects study design
>> Dear Julie,
>>
>> If I remember correctly, the cause of this (or related) problem must have
>> identified and fixed. Let me confirm it and get back to you.
>>
>> Makoto
>>
>> On Fri, Apr 1, 2016 at 9:45 AM, Schneider, Julie <jxs114631 at utdallas.edu>
>>  wrote:
>>
>>> Hello,
>>>
>>>
>>> I have been consistently receiving the error "Datasets to be
>>> concatenated do not have the same number of channels" during
>>> precomputing of channel measures.  I am facing a similar situation as
>>> mentioned in the thread: http://sccn.ucsd.edu/pipermail/eeglablist/2015/
>>> 009848.html in that when manually checking each dataset, they appear to
>>> have 64 channels each.
>>>
>>>
>>> However, when I tried using Makoto's recommendations to resolve this
>>> issue (which were greatly appreciated!) the download of a new EEGlab was
>>> only temporarily helpful, and the interpolation process remained
>>> necessary.  I have found that, across every study, this issue only exists
>>> when trying to compare GROUPS (between subjects design).  When running a
>>> within subjects study design, using the exact same data (i.e. same channel
>>> numbers) I have no issues.  How could I be using the same data and have it
>>> successfully precompute within subjects but suddenly have an inconsistent
>>> number of channels when precomputing between subjects?  Any recommendations
>>> are greatly appreciated!
>>>
>>>
>>> Thank you in advance for your help!
>>>
>>> Julie
>>>
>>>
>>> Julie M. Schneider, M.S.
>>>
>>> Doctoral Student
>>>
>>> The Developmental Neurolinguistics Lab
>>>
>>> Brain and Behavioral Sciences, University of Texas at Dallas
>>>
>> ---
>> Alyson D. Abel, Ph.D.
>> Assistant Professor, School of Speech, Language and Hearing Sciences
>> San Diego State University
>> 5500 Campanile Dr., Rm 227
>> San Diego, CA 92182
>> alyson.abel at mail.sdsu.edu
>> Office phone: (619) 594-4694
>>
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>
>
>
> --
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
>



-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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