Hi,
you probably need to adjust PPheights (peak-to-peak heights) to "1 1 6", with "6" being the distance between your smallest (-2) and your largest (4) value of the corresponding vector. Although I do not know to what extent this value influences subsequent statistics.
Cheers
Cornelius
Am 24.03.2010 um 11:22 schrieb Elena Miramontes:
> Hi,
>
> I have a further question concerning the design matrix, which I use for the voxelwise statistics in TBSS.
> At the moment my design matrix has two EV, the patient group and the control group.
> /Num Waves 2
> /Num Points 31
> /PPheights 1 1
> /Matrix
> 1 0
> 1 0
> 1 0
> 0 1
> 0 1
> 0 1
> ...
>
> Now, I want to add the age as a covariate. (I have demeaned the age). How do I have to change the values in /Num Waves, /Num Points and /PPheigts?
>
> My suggestion is:
> /Num Waves 3
> /Num Points 31
> /PPheights 1 1
> /Matrix
> 1 0 -2
> 1 0 1
> 1 0 -1
> 0 1 4
> 0 1 2
> 0 1 1
> ...
>
> Is that right?
> I changed the value in /Num Waves corresponding to the numbers of columns. But I didn't changed the value in /PPheights.
>
> Thank you for your help,
> Elena
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