Revision fec1958a3f9502fd8e3054cb0b95f55fc77ba527 authored by Max Turner on 12 April 2016, 00:46:24 UTC, committed by Max Turner on 12 April 2016, 00:46:24 UTC
1 parent ce75ca2
highPassFilter.m
function Xfilt = highPassFilter(X,F,SampleInterval)
% %F is in Hz
% %Sample interval is in seconds
% %X is a vector or a matrix of row vectors
L = size(X,2);
if L == 1 %flip if given a column vector
X=X';
L = size(X,2);
end
FreqStepSize = 1/(SampleInterval * L);
FreqKeepPts = round(F / FreqStepSize);
% eliminate frequencies beyond cutoff (middle of matrix given fft
% representation)
FFTData = fft(X, [], 2);
FFTData(:,1:FreqKeepPts) = 0;
FFTData(end-FreqKeepPts:end) = 0;
Xfilt = real(ifft(FFTData, [], 2));
% Wn = F*SampleInterval; %normalized frequency cutoff
% [z, p, k] = butter(1,Wn,'high');
% [sos,g]=zp2sos(z,p,k);
% myfilt=dfilt.df2sos(sos,g);
% Xfilt = filter(myfilt,X');
% Xfilt = Xfilt';
Computing file changes ...
