I have implemented Haar Function in MATLAB based on formulas stated here. However this formulas generate functions only between 0 and 1 (on [0..1] interval). I need to generate such functions periodically from -infinity to +infinity for instance with period = 1. It should depend on length of my time vector. For example if time vector on interval [0..10] I should generate Haar function vector on the same interval [0..10]. I hope you get a point. Here is my MATLAB code.
function [ f ] = haar(x) %Haar function % x: time vector vectorLength = length(x); f = zeros(1, vectorLength); for k = 1:vectorLength if (x(k) >= 0 && x(k) < 1/2) f(k) = 1; elseif (x(k) > 1/2 && x(k) <= 1) f(k) = -1; end; end; end