how do i run my signal through a filter i designed with filter design tool

Hi. I am novice matlab user. I have what my be a simple question to more experienced users.

I am trying to remove the dc offset(0.16hz) from an eeg signal. Having constructed a high pass filter in the filter designer toolbox, i have generated mablab code and inserted in to my .m file.

my question is how do i pass my signal through it, so that i may plot my results.

Thanks

Code below :

load nikita2.mat nik= nikita (:,3);

%*function Hd = nikitaHighPass Fs = 128; % sampling frequency N = 1; % Order Fc = 0.16; % Cutoff Frequency

% Construct an FDESIGN object and call its BUTTER method. h = fdesign.highpass('N,F3dB', N, Fc, Fs); Hd = design(h, 'butter', 'FilterStructure', 'df1sos');

% Question how do i get the matrix 'nik' through the filter so that i can create figures?

figure; plot(h,'nik'); h_legend=legend('AF3'); set(h_legend,'FontSize',14); title('NIKITA' offset 0.16HZ removed]','FontWeight','bold'); xlabel('Time / 128 samples per second'); ylabel('microVolts');

Answer 1

[Honglei Chen]

Please format your code in your question. I'm not sure what you mean by

plot(h,'nik')

but if you want to filter the signal, nik, you can do

y = filter(Hd,nik)