[FieldTrip] Query regarding extraction of amplitude and latency values

[Varghese Mathew 1881002]

Thank you for the reply. This gave me good clarity.

Sincerely
Varghese Mathew

On Wed, Jan 3, 2024 at 3:32 PM Schoffelen, J.M. (Jan Mathijs) via fieldtrip
<fieldtrip at science.ru.nl> wrote:

> Hi Mathew,
>
> If you want to extract amplitude values from a pre-specified time window,
> I would just compute the average ‘by hand’, i.e. take the mean (across the
> relevant dimension of the matrix) from a subselection of time points. If
> you want to extract the latency of a peak, and then use the amplitude
> corresponding to that peak, I would use MATLAB’s findpeaks function (or
> some other heuristic), and use the amplitude values that correspond to the
> identified peaks. This requires some ‘plain’ matlab coding, there’s no
> FieldTrip functionality that gives you such results directly.
>
> Good luck with your analysis,
> Jan-Mathijs
>
>
> On 29 Dec 2023, at 04:30, Varghese Mathew 1881002 via fieldtrip <
> fieldtrip at science.ru.nl> wrote:
>
> Hi
> I am a Ph.D. scholar working on face processing studies. I am currently
> trying to use the Fieldtrip toolbox for doing ERP analysis. I am able to
> plot the ERP and topo plots. I would like to know if there is a way to
> extract amplitude and latency values from different time windows of
> interest, to conduct statistical analysis in another software.
> I'm really looking forward to any leads.
>
> Thanks in advance
> --
> Varghese Mathew
> Ph.D Scholar
> CHRIST (Deemed to be university)
> Bangalore-29
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