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Hi Xiangzhen,

There is no need for orthogonalisation in this case it seems, and you can leave the boxes unchecked and not worry about it.

At any rate, I'm unaware of a command that does it directly, but it can be done in Matlab:

R = eye(size(X,1)) - Z*pinv(Z);

X = R*X;

where Z is the array of nuisance EVs and X the one with EVs of interest.

All the best,

Anderson

On 16 November 2015 at 05:48, Xiangzhen Kong <[log in to unmask]> wrote:

Hi,
In Feat, there is a check box for EV Orthogonalization. Is there any command for this operation? For example, there are three time courses (from three seed regions) in text files, and we want to calculate their functional connectivity map with each of others controlled.

Any suggestion is welcome.

Best,

Xiangzhen

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Kong Xiangzhen
State Key Laboratory of Cognitive Neuroscience and Learning,
Beijing Normal University,
Beijing, China, 100875.