[FieldTrip] power-frequency figure

[Jinyi Long]

Dear Tzvetan, Thanks for your help. First, to plot the spectral power for
one channel with the 'ft_singleplotER', how can I calculate the power
spectrum with 'ft_freqanalsis'? Can I use the following code to calculate
and plot power spectrum? Thanks a lot!

Best,
Jinyi




%% frequency analysis

cfg              = [];

cfg.output       = 'pow';%'fourier';%

% cfg.channel      = 'MEG';

cfg.method       = 'mtmconvol';

cfg.taper        = 'hanning';

cfg.foi          = 2:1:40;                         % analysis 2 to 30 Hz in
steps of 2 Hz

cfg.t_ftimwin    = ones(length(cfg.foi),1).*0.5;   % length of time window
= 0.5 sec

cfg.toi          = -0.5:0.05:4;                  % time window "slides"
from -0.5 to 1.5 sec in steps of 0.05 sec (50 ms)

TFRhann = ft_freqanalysis(cfg, data);

%% visualize

cfg = [];

cfg.baseline     = [-0.9 -0.1];

cfg.baselinetype = 'absolute';

cfg.maskstyle    = 'saturation';

cfg.zlim         = [-3e-7 3e-7];    %

cfg.channel      = '26';

figure

ft_singleplotER(cfg, TFRhann)




2014-11-07 1:33 GMT-05:00 Tzvetan Popov <tzvetan.popov at uni-konstanz.de>:

> Dear Jinyi,
> You can use ft_singleplotER to plot the power spectrum of a single
> channel. If you are interested in the same but for multiple channels than
> use ft_multiplotER. Finally if you are interested in the topography of a
> particular frequency you'd specify it in cfg.xlim=[begin end] and call
> ft_topoplotER.
> Good luck
> Tzvetan
>
>
>
> > Am 07.11.2014 um 00:23 schrieb Jinyi Long <longjinyi at gmail.com>:
> >
> > Dear Sir/Madam, Thanks for your powerful tool. Now I have one question.
> When I perform the frequency analysis with the function of
> 'ft_freqanalaysis', how can I plot the power-frequency figure but not 2D
> time-frequency figure at single channel? Thanks!
> >
> > Best,
> > Jinyi
> > _______________________________________________
> > fieldtrip mailing list
> > fieldtrip at donders.ru.nl
> > http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>
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