This line was meant to be: virtual_chans.trial = source.avg.filter{ 1} * data.trial{ 1}(chans,:); Tyler > On 5 Apr 2014, at 12:52 am, "Tyler Grummett" <tyler.grummett at flinders.edu.au> wrote: > > virtual_chans.trial = source.avg.filter{ 1} * timelock.trial{ 1}(chans,:);