Thank you Mark!
The error message appears when I save the matrix with glm_gui. However the
output files are saved (except the the design image), randomise run anyway
and everything seems to work. May I send you the files (*.con *.mat)
produced by glm_gui?
I really do not understand whether there is something wrong
Best wishes
Angela
> Dear Angela,
>
> That design matrix looks fine. Whether you split the covariates into
> separate EVs for each group or not is a question of what you are trying to
> test and has been covered in quite a number of emails on the list and also
> in Jeanette Mumford's great webpages on the subject. However, it is
> perfectly reasonable to do exactly what you've done.
>
> I do not know why you are getting the error and we need to see the exact
> command line from randomise before we can help further.
>
> All the best,
> Mark
>
>
>
>
> On 10 Dec 2012, at 14:20, Angela Favaro <[log in to unmask]> wrote:
>
>> Dear FSL experts,
>> I am getting crazy with a matrix I have prepared with glm_gui to be used
>> with TBSS (41 patients and 18 controls).
>>
>> It is a simple matrix with two groups and two covariates of no interest.
>> Contrasts: 1 -1 0 0 and -1 1 0 0
>>
>> EVs:
>>
>> group EV1(patients) EV2 (controls) age (dem) lat
>> (demeaned)
>> 1 1 0 13.9
>> -1.64
>> 1 1 0 -12.5
>> -1.64
>> 1 1 0 12.9
>> 0.36
>> 1 1 0 3.34
>> 0.36
>> 2 0 1 24.4
>> 0.36
>> 2 0 1 20.8
>> 0.36
>> 2 0 1 -1.7
>> 0.36
>>
>> age and lateralization were demeaned across groups and put in one
>> column20 since I am not interested in correlations
>> However I have the same problem splitting the age and lat EVs in two
>> I have used similar matrices in other studies without problems, but now
>> the software says:
>>
>> Problem with processing the model: child killed: segmentation violation
>>
>> What am I doing wrong?
>> Thank you!
>>
>> Angela
>>
>
>
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