On Mon, Nov 2, 2009 at 2:03 PM, Kay H. Brodersen <[log in to unmask]> wrote:
> I'd like
> to contrast my analysis with more traditional LFP analyses. In particular,
> I'd like to visualize the difference between the mean ERP of two conditions.
> I'm using 'spm_eeg_weight_epochs' to do this. Now I wonder why the default
> for the option 'WeightAve' is turned on. I assume, if I am simply interested
> in the difference between the mean of two conditions, then I do *not* want
> such weighting? Or is there more to this?
I don't think there is any deep reason behind this default. Just
there are some other cases when you would like to use weighted
averaging. For instance, when you have a lot of conditions and you
want to pool some of them and treat them as one. In your case you
should just do it unweighed as you intended.