% TRIANG.M%% P. Flandrin, Mar. 13, 2003%% generates a triangular waveform%% inputs :   - N : # of data samples%            - p : period%% output :   - x : signalfunction x = triang(N,p);K = ceil(N/(2*p-2));w = zeros(1,K*(2*p-2)+1);rp = linspace(-1,1,p);rn = linspace(1,-1,p);r = [rp rn(2:p)];for k = 1:K	w(1+(k-1)*(2*p-2):1+k*(2*p-2)) = r;endx = w(1:N);