Never average over repetition and solve 6 linear equations.
You need a lot of assumptions in order to do this. ...
Quoting dqqiu <[log in to unmask]>:
> Dear SPMers:
> I'm analyzing a normative dti data set imaged with 6 gradient
> directions
> and 4 repetitions. For calculation of the tensor and FA, I wonder
> whether it is better to average over repetition first and then
> solve 6
> linear equations, or just to put all together and solve
> overdetermined
> linear equations using Least Square Estimation.
>
> I know the question is not really of SPM, but I don't know other
> place
> to ask.
> Any suggestion is appreciated!
>
> Thanks in advance.
>
> Regards,
> Kenneth
> The University of Hong Kong.
>
>
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