Dear SPM experts,
I have applied ICA to my MEG data to remove blink artefacts.
The ICA transformation is executed at the last step of the preprocessing.
We used spm_eeg_montage.

The processus is working but when i looked at the topo plot of one trial (trial i knew
was contamined by a blink) via the display of the GUI, i get an error (see below) and the image is not normal (see attached).

Warning: Duplicate x-y data points detected: using average of the z values.
> In griddata at 105
> In spm_eeg_plotScalpData>doChangeTime at 248

Does anyone know where the problem come from?

Thank you very much for your answer,
--

Sophie Galer - Ph.D. student
National Fund for Scientific Research (F.R.S - FNRS)
Université Libre de Bruxelles
LCFC-UR2NF
+322/555.42.98

+322/650.42.62

Hôpital Erasme
808 route de Lennik
B-1070 Brussels, Belgium