npyoung · September 8, 2017 22:13
diff --git a/butterfilter.m b/butterfilter.m
 function [ y ] = butterfilter( x, cut, fs, type )
 %BUTTEFILTER Apply a Butterworth filter

 nyq = fs / 2;
 cutf = cut / nyq;

 if nargin == 4
    [b, a] = butter(5, cutf, type);
 elseif nargin == 3
    [b, a] = butter(5, cutf);
 end

 y = filtfilt(b, a, x);
diff --git a/maketime.m b/maketime.m
 function [ t ] = maketime( x, fs )
 %MAKETIME for your data
 t = (0:size(x,1)-1) / fs;
	function [ y ] = butterfilter( x, cut, fs, type )
	%BUTTEFILTER Apply a Butterworth filter

	nyq = fs / 2;
	cutf = cut / nyq;

	if nargin == 4
	[b, a] = butter(5, cutf, type);
	elseif nargin == 3
	[b, a] = butter(5, cutf);
	end

	y = filtfilt(b, a, x);