[FieldTrip] fieldtrip Digest, Vol 31, Issue 32

[Aaron Schurger]

Hi, Karen, Tineke,
To me it looks like more than just a baseline shift. It looks like
either linear de-trending or high-pass filtering was applied to the
BVA data. I don't see how a baseline shift could get rid of the low
frequency component that is clearly visible in the FT plot, but not
the BVA plot.
Cheers,
Aaron

On Mon, Jun 17, 2013 at 2:55 PM, Tineke Grent-'t-Jong
<t.grent-tjong at donders.ru.nl> wrote:
> Hi Karen,
>
> To me it looks like the only thing you need to do is subtract the baseline,
> like you have done in BVA (specifying the same window with cfg.baseline =
> [xmin xmax], not 'yes'). The average ERP that you are plotting in BVA has
> already been baselined, but the single trials that go into the
> ft_timelockanalysis function are not, hence the need for baselining later,
> like in your case at the level of plotting.
>
> Hope this helps,
>
> Tineke
>
>
> ----- Original Message ----- From: <fieldtrip-request at science.ru.nl>
> To: <fieldtrip at science.ru.nl>
> Sent: Monday, June 17, 2013 1:56 PM
> Subject: fieldtrip Digest, Vol 31, Issue 32
>
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>>   1. ERP average Brain Vision is different from ERP average
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-- 
Aaron Schurger, PhD
Post-doctoral researcher
INSERM U992 / NeuroSpin
CEA - Saclay, France
+33-1-69-08-66-47
aaron.schurger at gmail.com
http://www.unicog.org