[FieldTrip] EEG -> Topographic Matrix
yoel.sher at mail.huji.ac.il
Wed May 15 12:47:06 CEST 2013
Many thanks, I'll try it out.
On 05/15/2013 01:22 PM, Eelke Spaak wrote:
> Dear Yoel,
> Ah, I understand now; you want the interpolated matrix. This is not
> possible with standard FieldTrip code.
> However, it should not be very difficult to get this. I would
> recommend to set a breakpoint in plotting/ft_plot_topo.m, at line 220.
> Then, when the code breaks at that point, you can type in the command
> window assignin('base','Xi',Xi) and the same for Yi and Zi, that way
> you have the x and y coordinates and the data (z) in variables in your
> base workspace.
> Getting this matrix programmatically in a script should also be
> possible, but that would require custom hacks of ft_plot_topo (e.g.
> you could put this assignin call in your local copy of the function,
> or add Xi,Yi,Zi as output arguments, etc.)
> Good luck,
> On 15 May 2013 12:08, Yoel Sher <yoel.sher at mail.huji.ac.il> wrote:
>> Dear Eelke,
>> First, thanks for you fast replay. Second, let me clarify my question. I'm
>> looking for other result than the average ERP/ERF. I'm looking for a matrix
>> that output the EEG value per each location (not just the electrodes) on the
>> scalp. Of course that every location other than the electrode is an
>> interpolated value. The plot of ft_topoplotER shows that matrix (but does
>> not output, as far as I know).
>> On 05/14/2013 08:25 PM, Eelke Spaak wrote:
>>> Dear Yoel,
>>> I'm not sure if I understand what you mean exactly, but do you simply
>>> want the values plotted by ft_topoplotER in case of plotting the
>>> results of ft_timelockanalysis? In that case, you can look at the
>>> tl.avg field (if tl = ft_timelockanalysis(cfg, data)). But that seems
>>> rather trivial, so I think you must mean something else.
>>> On 14 May 2013 18:09, Yoel Sher <yoel.sher at mail.huji.ac.il> wrote:
>>>> Dear FieldTrippers,
>>>> I would like to know if there is an option to extract the Topographic map
>>>> (Such as the scalp in ft_topoplotER) to a matrix. I've searched around
>>>> functions in fieldtrip and couldn't find any..
>>>> Many Thanks,
>>>> fieldtrip mailing list
>>>> fieldtrip at donders.ru.nl
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>>> fieldtrip at donders.ru.nl
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