function plot0(y)
% plot0(y) 
% Plot 1D array (ACF, SDF, etc.) with appropriate abscissa

global sr;				% sampling rate

range = size(y, 2) / sr;
x = abscissa(range) * 1000;	% ms
stairs(x, y(1:size(x,2)));
set(get(gca, 'XLabel'), 'String', 'lag (ms)');