Perfect - that is just the information I was looking for. Thanks so much!
Out of curiosity, what do the columns in the melodic_Tmodes correspond with?
I apologize if I am asking something that is detailed in a manual somewhere
- I have been searching for information on what the output files correspond
with but have not been able to find it.
On Mon, 20 Apr 2009 09:15:17 -1000, Steve Smith <[log in to unmask]> wrote:
>Hi - you want the file melodic_mix which contains a column for each
>ICA component, and each column is the concatenation across time of all
>subjects' temporal chunks of that component's full timecourse - so
>split that up vertically and then you can compare that data separately
>for each subject against their own model. I guess they are demeaned so
>the model will also need to be.
>
>Cheers.
>
>
>
>On 20 Apr 2009, at 04:55, SUBSCRIBE FSL Anonymous wrote:
>
>> Sorry, I meant to ask what the output file melodic_Tmodes saves. It
>> has as
>> many rows as there are volumes in my analysis, so it seems to be the
>> time
>> series, but although the number of columns increases as the number of
>> sessions entered in the analysis increases, it is not a clear
>> correspondence
>> between the number of columns and the number of sessions (e.g., 234
>> columns
>> for an analysis with 72 sessions that yielded 15 components).
>>
>> thanks,
>> Mara
>>
>> On Mon, 20 Apr 2009 15:34:25 +0100, M Mather <[log in to unmask]>
>> wrote:
>>
>>> I have run a group ICA using the concatenation mode and have what
>>> looks like
>>> a meaningful set of components. However, we counterbalanced task
>>> block order
>>> across subjects and so cannot use the built-in post-stats options to
>>> correlate the components with what the subjects saw. Is there some
>>> other
>>> way we could compute a correlation between the time course of a
>>> particular
>>> component for a subject and the conditions that subject saw over
>>> that time
>>> course? It seems that we might be able to use the output files
>>> from the
>>> analysis if there is a text file in which each subjects' time
>>> course for
>>> each component was saved.
>>>
>>> Related to this, what is the information saved in melodic_Smodes?
>>> I can't
>>> figure it out since the number of columns is not divisible by
>>> either the
>>> number of components or the number of sessions.
>>>
>>> Many thanks for your help,
>>> Mara
>>
>
>
>---------------------------------------------------------------------------
>Stephen M. Smith, Professor of Biomedical Engineering
>Associate Director, Oxford University FMRIB Centre
>
>FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
>+44 (0) 1865 222726 (fax 222717)
>[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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