[FieldTrip] EEG -> Topographic Matrix

[Yoel Sher]

Dear Eelke,

Many thanks, I'll try it out.

Best,
- Yoel

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,
> best,
>
> Eelke
>
> 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).
>>
>> Regards,
>> Yoel
>>
>>
>> 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.
>>>
>>> Best,
>>> Eelke
>>>
>>> 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
>>>> the
>>>> functions in fieldtrip and couldn't find any..
>>>>
>>>> Many Thanks,
>>>> Yoel
>>>> _______________________________________________
>>>> fieldtrip mailing list
>>>> fieldtrip at donders.ru.nl
>>>> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>>> _______________________________________________
>>> fieldtrip mailing list
>>> fieldtrip at donders.ru.nl
>>> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>>>
> _______________________________________________
> fieldtrip mailing list
> fieldtrip at donders.ru.nl
> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>