Hi
in melodic this is a simple variance ratio test (using the spatio-temporal model with and without a component). Once calcualted these % variances get re-normalised (divided by their sum) due to the fact that non-orthogonality means that potentially a certain bit of variance can be explained mutliple times. For the 'uniquely explained' numbers the same thing is done, but partialling out all other N-1 components first.
hth
Christian
On 5 Aug 2010, at 05:36, Jack Grinband wrote:
> Hi Christian,
> So how does one calculate the % variance explained?
> thanks,
>
> jack
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