[FieldTrip] dipole simulation on head model
gamaliel huerta urrea
gamaliel.ghu at gmail.com
Tue Sep 16 06:49:37 CEST 2014
Hi all
I followed the tips above to simulate a dipole source on my own head model
generated from MRIs. However, using information from:
http://fieldtrip.fcdonders.nl/example/compute_forward_simulated_data_and_apply_a_dipole_fit
I could not simulate anything. Only one image is blank. The code I am using
is as follows:
cfg = [];
cfg.vol = vol; % See above
cfg.elec = elec; % See above
cfg.dip.pos = [0 0 0];
cfg.dip.mom = [2 2 2]; % Note, it Should be transposed
cfg.dip.frequency = 10;
cfg.ntrials = 10;
cfg.triallength = 1; % seconds
cfg.fsample = 25; % Hz
raw1 = ft_dipolesimulation (cfg);
ft_timelockanalysis avg1 = ([], raw1);
plot (avg1.time, avg1.avg); % Plot the timecourse
where:
vol = ft_prepare_headmodel volumes generated from the segmentation of my
resonances.
and
ft_read_sens elec = ('standard_1020.elc');
to run the script the result is a blank image.
and Matlab tells me the following:
using headmodel specified in the configuration
using electrodes specified in the configuration
Determining source compartment (1)
projecting electrodes on skin surface
electrode and system combine combining transfer matrix
computing simulated data
computing simulated trial data for 10
RMS value of simulated data is NaN
the call to "ft_dipolesimulation" took 4 seconds
the input is raw Data with 97 channels and 10 trials
Warning: the data does not Contain a definition trial
> In utilities \ private \ warning_once at 158
In utilities \ private \ fixsampleinfo at 66
In ft_datatype_raw at 157
In ft_checkdata at 224
In ft_timelockanalysis at 105
In codgen at 50
Warning: sampleinfo by reconstructing Assuming That the trials are
consecutive segments of
a continuous recording
> In utilities \ private \ warning_once at 158
In utilities \ private \ fixsampleinfo at 79
In ft_datatype_raw at 157
In ft_checkdata at 224
In ft_timelockanalysis at 105
In codgen at 50
averaging trials
trial averaging 10 of 10
the call to "ft_timelockanalysis" took 1 seconds
I hope you can help
greetings
--
*Gamaliel Huerta*
*Ingeniería Civil Biomédica*
*Universidad de Valparaíso*
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20140916/ae7b7b89/attachment-0001.html>
More information about the fieldtrip
mailing list