Hi, Thanks. I used version 5.98 and the error was: Warning - design
matrix uses different groups (for different variances), but these do not
contain "separable" EVs for the different groups (it is necessary that,
for each EV, only one of the groups has non-zero values).
Vina
Steve Smith wrote:
> What FSL program are you running and what error are you getting?
>
>
> On 31 Jan 2009, at 19:19, Vina Goghari wrote:
>
>> Hi FSL Group,
>> Reading up on previous covariate inclusion in models I had thought
>> the following model was doable but I am getting an error.
>>
>> I have three groups and three covariates I want to include (not super
>> interested in seeing the effect of group so I thought I could enter
>> it like this). Thus I coded it like this:
>>
>> Group1 Group2 Group3 AgeCovariate GenderCovariate
>> ScannerVersionCovariate
>> 1 1 0 0
>> 34 1 1
>> 1 1 0 0
>> 45 2 2
>> 1 1 0 0
>> 52 1 2
>> 2 0 1 0
>> 34 2 2
>> 2 0 1 0
>> 76 2 2
>> 2 0 1 0
>> 24 2 1
>> 3 0 0 1
>> 19 2 1
>> 3 0 0 1
>> 9 1 1
>> 3 0 0 1
>> 35 1 1
>>
>> Do I need to split the each covariate into 3 columns one per group?
>>
>> Thanks,
>> Vina
>>
>
>
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>
> Stephen M. Smith, Professor of Biomedical Engineering
> Associate Director, Oxford University FMRIB Centre
>
> FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
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