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Dear Vladimir,
Dear SPM-M/EEG experts,

 I have two questions concerning source waveform extraction.

I made a source reconstruction with these parameters :
  type: 'GS'
         woi: [650 900]
         Han: 1
         lpf: 0
         hpf: 128
          pQ: {}
      trials: {'1'  '2'  '3'  '4'  '5'  '6'}
    modality: {'MEGPLANAR'  'MEG'}
      smooth: 0.6000
         xyz: [0 0 0]
         rad: 128
       scale: [6.1519e+07 -3.7706e+09]
           M: [8196x176 double]
           J: {1x6 cell}
           Y: {1x6 cell}
           L: [176x8196 double]
          qC: [8196x1 double]
          qV: [63x63 double]
           T: [63x10 double]
           U: {[107x204 double]  [69x102 double]}
          Is: [8196x1 double]
          It: [1x63 double]
          Ic: {[1x204 double]  [1x102 double]}
          Nd: 8196
         pst: [1x63 double]
         dct: [1x63 double]
           F: -8.9217e+03
          ID: 314.5232
          R2: 94.7399
          VE: 94.2432

My first question is: when I used the code that you provided in a
previous mail (31/12/2012, see attachment 1) to extract the source
waveform in a particular MNI coordinate (28, 14 -28), it gives me the
temporal sequence on the interest window (650-900, see attachment 2),
but I would have preferred to plot results on all the epoch (0-900ms),
is that possible?

Secondly, I found this  MNI coordinate of interest (28, 14 -28) at the
group level (by producing separate source reconstructions for each
participant. These reconstructions were then analyzed by
proportionally scaling the results and submitting the reconstructions
to the general linear models and contrasts of interest). I was
wondering what should be the best way to represent the sourcewave of
this specific result/activation? Should I reconstruct the grand
average and plot it sourcewave ?

Thank you very much for your help,

best,

 Charline