[FieldTrip] about detrend

[Rodrigo Montefusco]

Hi Yun,
If I'm right, just by high-pass filtering your data you should be able to
remove the DC component of it.

Best

Rodrigo

On Fri, Dec 5, 2014 at 4:20 PM, Yun Wen <Yun.Wen at nottingham.ac.uk> wrote:

> Hi all, I want to remove DC offset before applying the high-pass filter.
> I  was wondering if I can achieve that by putting cfg.detrend = 'yes'
> before cfg.hpfilter = 'yes', something like:
>
>
>
> cfg = [];
>
> cfg.dataset = filename_raweeg;
>
> cfg.detrend = 'yes';
>
> cfg.hpfilter = 'yes';
>
> cfg.hpfiltord = 2; % Order of the filter = 2.
>
> cfg.hpfreq = 0.1; % High-pass cutoff at 0.1 Hz;
>
> [data] = ft_preprocessing (cfg);
>
>
>
> Thank you in advance.
>
>
>
> Best,
>
> Yun
>
>
>
>
>
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